Move OpticalFlowPyrLK from ocl module to video module
Fix error with some opencl functions on the build WITH_OPENCL=OFF
Validate parameters for using OpenCL version, before upload UMat
Fix builds errors
Fix builds errors
Add perfomance test
Grow up epsilon for sanity checks
Change method of setting arguments to kernel to safe one
Fix build error
Change type of result vector of ocl version from row to column
Unused code removed
Merge pull request #2155 from vbystricky:ocl_calcOpticalFlowPyrLK