added perf test for moments

performance moments
check_regression=*moments* 
**merge with Itseez/opencv_extra/pull/191** 
build_examples=OFF 
test_modules=imgproc
Please merge with https://github.com/Itseez/opencv_extra/pull/191
all the tests with prefix `OCL` are located in `module_name/perf/opencl`. And as I previously said, we already have OpenCL test for `CV_8UC1`. I don't see any reason for keeping 2 identical tests, so I believe it should be removed.