perf: test-based metrics collection strategy
core/ocl: added perf test infra + "Add" perf test
Merge pull request #1902 from ilya-lavrenov:tapi_arithm
Merge pull request #1903 from ilya-lavrenov:tapi_warp
Merge pull request #1909 from alalek:ocl_tapi_perf
added tests to imgproc
added cv::copyMakeBorder to T-API
added cv::threshold to T-API