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/core/perf/perf_dot.cpp

@@ -1,12 +1,10 @@
 #include "perf_precomp.hpp"
 
-using namespace std;
-using namespace cv;
+namespace opencv_test
+{
 using namespace perf;
-using std::tr1::make_tuple;
-using std::tr1::get;
 
-typedef tr1::tuple<MatType, int> MatType_Length_t;
+typedef tuple<MatType, int> MatType_Length_t;
 typedef TestBaseWithParam<MatType_Length_t> MatType_Length;
 
 PERF_TEST_P( MatType_Length, dot,
@@ -29,3 +27,5 @@ PERF_TEST_P( MatType_Length, dot,
 
     SANITY_CHECK(product, 1e-6, ERROR_RELATIVE);
 }
+
+} // namespace