Viz test data
Merge pull request #119 from Nerei:viz_backport
added sanity data for cv::sqrBoxFilter
Merge pull request #130 from ilya-lavrenov:tapi_sqrboxfilter
decrease input size for several gpu tests to fix "timed out" error:

* BruteForceNonLocalMeans
* OpticalFlowBM
Merge pull request #138 from jet47:gpu-tests-timeout
Merge remote-tracking branch 'origin/2.4'