Added ippiPyrDown_Gauss5x5 to cv::pyrDown
Added ippiPyrUp_Gauss5x5 to cv::pyrUp
Added perf test for cv::buildPyramid
Added IPP Pyramid API functions to cv::buildPyramid
Added epsilon for tests with float data type
Fixed sanity check for integer type
Added setIppErrorStatus
Merge pull request #2627 from akarsakov:ipp_pyramids