Update OpenCV dependency for image proc, cv_bridge, image iamge_geometry to 4.2

[Michael-Equi]

/usr/bin/ld: warning: libopencv_imgproc.so.3.2, needed by /opt/ros/eloquent/lib/libcv_bridge.so, may conflict with libopencv_imgproc.so.4.2
/usr/bin/ld: warning: libopencv_core.so.3.2, needed by /opt/ros/eloquent/lib/libcv_bridge.so, may conflict with libopencv_core.so.4.2
/usr/bin/ld: warning: libopencv_calib3d.so.3.2, needed by /opt/ros/eloquent/lib/libimage_geometry.so, may conflict with libopencv_calib3d.so.4.2