Eliminate the need of ::testsing::ValuesIn() for CV_ENUM

Also cv::, cv::gpu:: and cv::ocl:: namespace prefixes can be safely omitted
inside CV_ENUM and CV_FLAGS

modules/video/perf/perf_optflowpyrlk.cpp

@@ -185,7 +185,7 @@ PERF_TEST_P(Path_Win_Deriv_Border_Reuse, OpticalFlowPyrLK_pyr, testing::Combine(
                 testing::Values<std::string>("cv/optflow/frames/720p_01.png"),
                 testing::Values(7, 11),
                 testing::Bool(),
-                testing::ValuesIn(PyrBorderMode::all()),
+                PyrBorderMode::all(),
                 testing::Bool()
                 )
             )