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_ippasync.cpp

@@ -1,3 +1,6 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
 #include "test_precomp.hpp"
 #include "opencv2/ts/ocl_test.hpp"
 
@@ -6,9 +9,9 @@
 
 using namespace cv;
 using namespace std;
-using namespace cvtest;
+using namespace opencv_test;
 
-namespace cvtest {
+namespace opencv_test {
 namespace ocl {
 
 PARAM_TEST_CASE(IPPAsync, MatDepth, Channels, hppAccelType)