Update for IPP for OpenCV 2017u2 integration;

Updated integrations for:
cv::split
cv::merge
cv::insertChannel
cv::extractChannel
cv::Mat::convertTo - now with scaled conversions support
cv::LUT - disabled due to performance issues
Mat::copyTo
Mat::setTo
cv::flip
cv::copyMakeBorder - currently disabled
cv::polarToCart
cv::pow - ipp pow function was removed due to performance issues
cv::hal::magnitude32f/64f - disabled for <= SSE42, poor performance
cv::countNonZero
cv::minMaxIdx
cv::norm
cv::canny - new integration. Disabled for threaded;
cv::cornerHarris
cv::boxFilter
cv::bilateralFilter
cv::integral

modules/objdetect/src/haar.cpp

@@ -340,8 +340,8 @@ icvCreateHidHaarClassifierCascade( CvHaarClassifierCascade* cascade )
             out->isStumpBased &= node_count == 1;
         }
     }
-/*
-#ifdef HAVE_IPP
+
+#if defined HAVE_IPP && !IPP_DISABLE_HAAR
     int can_use_ipp = CV_IPP_CHECK_COND && (!out->has_tilted_features && !out->is_tree && out->isStumpBased);
 
     if( can_use_ipp )
@@ -396,7 +396,7 @@ icvCreateHidHaarClassifierCascade( CvHaarClassifierCascade* cascade )
         }
     }
 #endif
-*/
+
     cascade->hid_cascade = out;
     assert( (char*)haar_node_ptr - (char*)out <= datasize );