- removed tr1 usage (dropped in C++17)
- moved includes of vector/map/iostream/limits into ts.hpp
- require opencv_test + anonymous namespace (added compile check)
- fixed norm() usage (must be from cvtest::norm for checks) and other conflict functions
- added missing license headers

  * modify test, too

it might cause errors, due to implicit type conversion and another cuda::divide
overload

This reverts commit fba72cb6, reversing
changes made to 02131ffb.

Also cv::, cv::gpu:: and cv::ocl:: namespace prefixes can be safely omitted
inside CV_ENUM and CV_FLAGS

Fixed issues: #2737 #2848

This reverts commit ab25fe9e.