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/photo/perf/perf_inpaint.cpp

@@ -14,7 +14,7 @@ typedef perf::TestBaseWithParam<InpaintArea_InpaintingMethod_t> InpaintArea_Inpa
 PERF_TEST_P(InpaintArea_InpaintingMethod, inpaint,
             testing::Combine(
                 testing::Values(::perf::szSmall24, ::perf::szSmall32, ::perf::szSmall64),
-                testing::ValuesIn(InpaintingMethod::all())
+                InpaintingMethod::all()
                 )
             )
 {