refactored ocl matrix operations accuracy tests
made more demonstrative message about test fails
misprint
Merge pull request #1651 from ilya-lavrenov:misprint
missed initialization of kernel size
fixed ocl::Laplacian for case when scale != 1
Merge pull request #1633 from ilya-lavrenov:ocl_imgproc
Merge pull request #1644 from ilya-lavrenov:ocl_matrix_operations
Merge pull request #1645 from ilya-lavrenov:ocl_morph_test_fix
Merge pull request #1647 from ilya-lavrenov:ocl_tests_demonstrative
OpenCL examples refactoring