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/cudafeatures2d/test/test_features2d.cpp

@@ -44,7 +44,7 @@
 
 #ifdef HAVE_CUDA
 
-using namespace cvtest;
+namespace opencv_test { namespace {
 
 /////////////////////////////////////////////////////////////////////////////////////////////////
 // FAST
@@ -55,8 +55,6 @@ namespace
     IMPLEMENT_PARAM_CLASS(FAST_NonmaxSuppression, bool)
 }
 
-namespace {
-
 PARAM_TEST_CASE(FAST, cv::cuda::DeviceInfo, FAST_Threshold, FAST_NonmaxSuppression)
 {
     cv::cuda::DeviceInfo devInfo;
@@ -710,6 +708,5 @@ INSTANTIATE_TEST_CASE_P(CUDA_Features2D, BruteForceMatcher, testing::Combine(
     testing::Values(DescriptorSize(57), DescriptorSize(64), DescriptorSize(83), DescriptorSize(128), DescriptorSize(179), DescriptorSize(256), DescriptorSize(304)),
     testing::Values(UseMask(false), UseMask(true))));
 
-} // namespace
-
+}} // namespace
 #endif // HAVE_CUDA