Support Ubunutu 20.04 which uses OpenCV 4 and PCL 1.10

[goldbattle]

This fixes two errors in trying to build on an Ubunutu 20.04 machine.
This is on ros noetic with opencv 4 and pcl 1.10.
Here are the two errors:

OpenCV 4 Errors:

Errors     << file_player:make /home/patrick/workspace/catkin_ws_ov/logs/file_player/build.make.005.log                                       
/home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.cpp: In member function ‘void ROSThread::StereoThread()’:
/home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.cpp:1515:63: error: ‘CV_LOAD_IMAGE_ANYDEPTH’ was not declared in this scope
 1515 |         current_left_image = imread(current_stereo_left_name, CV_LOAD_IMAGE_ANYDEPTH);
      |                                                               ^~~~~~~~~~~~~~~~~~~~~~
/home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.cpp:1556:59: error: ‘CV_LOAD_IMAGE_ANYDEPTH’ was not declared in this scope
 1556 |           next_left_image = imread(next_stereo_left_name, CV_LOAD_IMAGE_ANYDEPTH);
      |                                                           ^~~~~~~~~~~~~~~~~~~~~~
/home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.cpp: In member function ‘void ROSThread::OmniThread()’:
/home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.cpp:1650:50: error: ‘CV_LOAD_IMAGE_COLOR’ was not declared in this scope
 1650 |         omni0_image = imread(current_omni0_name, CV_LOAD_IMAGE_COLOR);
      |                                                  ^~~~~~~~~~~~~~~~~~~
/home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.cpp:1733:49: error: ‘CV_LOAD_IMAGE_COLOR’ was not declared in this scope
 1733 |           omni0_image = imread(next_omni0_name, CV_LOAD_IMAGE_COLOR);
      |                                                 ^~~~~~~~~~~~~~~~~~~
make[2]: *** [CMakeFiles/file_player.dir/build.make:104: CMakeFiles/file_player.dir/src/ROSThread.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [CMakeFiles/Makefile2:2549: CMakeFiles/file_player.dir/all] Error 2
make: *** [Makefile:141: all] Error 2

PCL Errors (small subset):

/usr/include/c++/9/bits/stl_algo.h:161:23:   required from ‘_Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = __gnu_cxx::__ops::_Iter_pred<pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)> >]’
/usr/include/c++/9/bits/stl_algo.h:3963:28:   required from ‘_IIter std::find_if(_IIter, _IIter, _Predicate) [with _IIter = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>]’
/usr/include/pcl-1.10/pcl/common/io.h:65:77:   required from here
/usr/include/c++/9/bits/predefined_ops.h:283:11: error: no match for call to ‘(pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>) (const pcl::PCLPointField&)’
  283 |  { return bool(_M_pred(*__it)); }
      |           ^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/pcl-1.10/pcl/io/file_io.h:41,
                 from /usr/include/pcl-1.10/pcl/io/pcd_io.h:44,
                 from /opt/ros/noetic/include/pcl_conversions/pcl_conversions.h:70,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.h:67,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/mainwindow.h:13,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/mainwindow.cpp:1:
/usr/include/pcl-1.10/pcl/common/io.h:65:9: note: candidate: ‘pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>’
   65 |         [&field_name](const auto field) { return field.name == field_name; });
      |         ^
/usr/include/pcl-1.10/pcl/common/io.h:65:9: note:   no known conversion for argument 1 from ‘const pcl::PCLPointField’ to ‘int’
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/mainwindow.h:3,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/main.cpp:1:
/usr/include/c++/9/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Iter_pred<_Predicate>::operator()(_Iterator) [with _Iterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = pcl::toPCLPointCloud2(const pcl::PCLPointCloud2&, pcl::PCLImage&)::<lambda(const int&)>]’:
/usr/include/c++/9/bits/stl_algo.h:120:14:   required from ‘_RandomAccessIterator std::__find_if(_RandomAccessIterator, _RandomAccessIterator, _Predicate, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = __gnu_cxx::__ops::_Iter_pred<pcl::toPCLPointCloud2(const pcl::PCLPointCloud2&, pcl::PCLImage&)::<lambda(const int&)> >]’
/usr/include/c++/9/bits/stl_algo.h:161:23:   required from ‘_Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = __gnu_cxx::__ops::_Iter_pred<pcl::toPCLPointCloud2(const pcl::PCLPointCloud2&, pcl::PCLImage&)::<lambda(const int&)> >]’
/usr/include/c++/9/bits/stl_algo.h:3963:28:   required from ‘_IIter std::find_if(_IIter, _IIter, _Predicate) [with _IIter = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = pcl::toPCLPointCloud2(const pcl::PCLPointCloud2&, pcl::PCLImage&)::<lambda(const int&)>]’
/usr/include/pcl-1.10/pcl/conversions.h:318:93:   required from here
/usr/include/c++/9/bits/predefined_ops.h:283:11: error: no match for call to ‘(pcl::toPCLPointCloud2(const pcl::PCLPointCloud2&, pcl::PCLImage&)::<lambda(const int&)>) (const pcl::PCLPointField&)’
  283 |  { return bool(_M_pred(*__it)); }
      |           ^~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/predefined_ops.h:283:11: note: candidate: ‘void (*)(const int&)’ <conversion>
/usr/include/c++/9/bits/predefined_ops.h:283:11: note:   candidate expects 2 arguments, 2 provided
In file included from /opt/ros/noetic/include/pcl_conversions/pcl_conversions.h:44,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.h:67,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/mainwindow.h:13,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/main.cpp:1:
/usr/include/pcl-1.10/pcl/conversions.h:317:28: note: candidate: ‘pcl::toPCLPointCloud2(const pcl::PCLPointCloud2&, pcl::PCLImage&)::<lambda(const int&)>’
  317 |     const auto predicate = [](const auto& field) { return field.name == "rgb"; };
      |                            ^
/usr/include/pcl-1.10/pcl/conversions.h:317:28: note:   no known conversion for argument 1 from ‘const pcl::PCLPointField’ to ‘const int&’
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/mainwindow.h:3,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/main.cpp:1:
/usr/include/c++/9/bits/predefined_ops.h: In instantiation of ‘bool __gnu_cxx::__ops::_Iter_pred<_Predicate>::operator()(_Iterator) [with _Iterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>]’:
/usr/include/c++/9/bits/stl_algo.h:120:14:   required from ‘_RandomAccessIterator std::__find_if(_RandomAccessIterator, _RandomAccessIterator, _Predicate, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = __gnu_cxx::__ops::_Iter_pred<pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)> >]’
/usr/include/c++/9/bits/stl_algo.h:161:23:   required from ‘_Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = __gnu_cxx::__ops::_Iter_pred<pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)> >]’
/usr/include/c++/9/bits/stl_algo.h:3963:28:   required from ‘_IIter std::find_if(_IIter, _IIter, _Predicate) [with _IIter = __gnu_cxx::__normal_iterator<const pcl::PCLPointField*, std::vector<pcl::PCLPointField> >; _Predicate = pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>]’
/usr/include/pcl-1.10/pcl/common/io.h:65:77:   required from here
/usr/include/c++/9/bits/predefined_ops.h:283:11: error: no match for call to ‘(pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>) (const pcl::PCLPointField&)’
  283 |  { return bool(_M_pred(*__it)); }
      |           ^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/pcl-1.10/pcl/io/file_io.h:41,
                 from /usr/include/pcl-1.10/pcl/io/pcd_io.h:44,
                 from /opt/ros/noetic/include/pcl_conversions/pcl_conversions.h:70,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/ROSThread.h:67,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/mainwindow.h:13,
                 from /home/patrick/workspace/catkin_ws_ov/src/file_player/src/main.cpp:1:
/usr/include/pcl-1.10/pcl/common/io.h:65:9: note: candidate: ‘pcl::getFieldIndex(const pcl::PCLPointCloud2&, const string&)::<lambda(int)>’
   65 |         [&field_name](const auto field) { return field.name == field_name; });
      |         ^
/usr/include/pcl-1.10/pcl/common/io.h:65:9: note:   no known conversion for argument 1 from ‘const pcl::PCLPointField’ to ‘int’
make[2]: *** [CMakeFiles/file_player.dir/build.make:78: CMakeFiles/file_player.dir/file_player_autogen/mocs_compilation.cpp.o] Error 1
make[2]: *** [CMakeFiles/file_player.dir/build.make:91: CMakeFiles/file_player.dir/src/mainwindow.cpp.o] Error 1
make[2]: *** [CMakeFiles/file_player.dir/build.make:117: CMakeFiles/file_player.dir/src/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:2549: CMakeFiles/file_player.dir/all] Error 2
make: *** [Makefile:141: all] Error 2