fix tests
cvtColor
cv::Laplacian
fixed warning
Merge pull request #2614 from ilya-lavrenov:ipp_laplacian
Merge pull request #2610 from ilya-lavrenov:ipp_cvtcolor
Merge pull request #2609 from alalek:tests_fixes
cv::Laplacian
cv::min/cv::max CV_64F
cv::accumulate
cv::transpose inplace
cv::flip inplace
Mat::copyTo with mask
Mat::copyTo
Mat::setTo(Scalar::all(0))
Mat::setTo(with mask)
cv::cornerHarris
cv::filterSpeckles
fixed warnings
cv::multiply