refactored all the tests in ocl/test/test_imgproc.cpp
added ROI support to ocl::CLAHE
added ROI support to ocl::columnSum
added ROI support to ocl::convolve
fixed ocl::copyMakeBorder
rewrote ocl::remap
enabled double in copyMakeBorder kernel
added reflect, reflect101, replicate, wrap border types to ocl::remap
Merge pull request #1633 from ilya-lavrenov:ocl_imgproc