ts: refactor OpenCV tests

- 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

modules/cudaarithm/test/test_arithm.cpp

@@ -44,9 +44,7 @@
 
 #ifdef HAVE_CUDA
 
-using namespace cvtest;
-
-namespace {
+namespace opencv_test { namespace {
 
 //////////////////////////////////////////////////////////////////////////////
 // GEMM
@@ -430,6 +428,6 @@ INSTANTIATE_TEST_CASE_P(CUDA_Arithm, Convolve, testing::Combine(
 
 #endif // HAVE_CUBLAS
 
-} // namespace
+}} // namespace
 
 #endif // HAVE_CUDA