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/test/test_lpsolver.cpp

@@ -39,7 +39,8 @@
 //
 //M*/
 #include "test_precomp.hpp"
-#include <iostream>
+
+namespace opencv_test { namespace {
 
 TEST(Core_LPSolver, regression_basic){
     cv::Mat A,B,z,etalon_z;
@@ -139,3 +140,5 @@ TEST(Core_LPSolver, regression_cycling){
     //ASSERT_EQ(res,1);
 #endif
 }
+
+}} // namespace