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/features2d/perf/perf_fast.cpp

@@ -18,7 +18,7 @@ typedef perf::TestBaseWithParam<File_Type_t> fast;
 
 PERF_TEST_P(fast, detect, testing::Combine(
                             testing::Values(FAST_IMAGES),
-                            testing::ValuesIn(FastType::all())
+                            FastType::all()
                           ))
 {
     String filename = getDataPath(get<0>(GetParam()));