Update system.cpp

Cleaned up to use the preferred namespace code.  This can be further simplified by using the HString/HStringReference classes from wrl\wrappers\corewrappers.h
Added ocl::pyrDown to T-API
Added ocl::pyrUp to T-API
imgproc: IPP compilation fix and minor cleanup
Merge pull request #1950 from GregoryMorse:patch-2
Merge pull request #1995 from akarsakov:ocl_pyramids
added cv::mulSpectrums to T-API
Merge pull request #2032 from ilya-lavrenov:tapi_mulSpectrums
Merge pull request #2030 from LeszekSwirski:fix-imgproc-ipp
refactored cv::CamShift and cv::meanShift
fixed cv::multuply, cv::divide
Merge pull request #2035 from ilya-lavrenov:tapi_CamShift
Merge pull request #2041 from ilya-lavrenov:tapi_mul_div
added cv::normalize to T-API; implemented missed UMat::copyTo with mask
Merge pull request #2033 from ilya-lavrenov:tapi_normalize