recursive mutex for linux
ocl: disable tests
Merge pull request #1862 from alalek:ocl_disable_tests
mouse_and_match.py missing import cv2
Merge pull request #1850 from ilya-lavrenov:pthread_mutex
Merge pull request #1864 from berak:mouse_and_match
fixed ocl_arithm_op; fix for 3-channel images is needed