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/shape/test/test_shape.cpp

@@ -41,8 +41,7 @@
 
 #include "test_precomp.hpp"
 
-using namespace cv;
-using namespace std;
+namespace opencv_test { namespace {
 
 template <typename T, typename compute>
 class ShapeBaseTest : public cvtest::BaseTest
@@ -63,7 +62,7 @@ public:
         {
             for (int j = 0; j < NSN; ++j)
             {
-                stringstream filename;
+                std::stringstream filename;
                 filename << cvtest::TS::ptr()->get_data_path()
                          << "shape/mpeg_test/" << *i << "-" << j + 1 << ".png";
                 filenames.push_back(filename.str());
@@ -321,3 +320,5 @@ TEST(computeDistance, regression_4976)
     EXPECT_NEAR(d1, 26.4196891785, 1e-3) << "HausdorffDistanceExtractor";
     EXPECT_NEAR(d2, 0.25804194808, 1e-3) << "ShapeContextDistanceExtractor";
 }
+
+}} // namespace