Merge pull request #16886 from mpashchenkov:mp/ocv-gapi-add-disable

G-API: DISABLED_ in tests instead #if 0

* Removed if 0, replaced with DISABLED_

* boner

* Added tests for fluid

* -1 instead 0.0

* Added GMatDesc's tests for own::Mat

* IMGPROC_FLUID CORE_FLUID

* Added use_only, disabled tests without kernels

modules/gapi/test/gpu/gapi_imgproc_tests_gpu.cpp

@@ -11,7 +11,7 @@
 
 namespace
 {
-#define IMGPROC_GPU [] () { return cv::compile_args(cv::gapi::imgproc::gpu::kernels()); }
+#define IMGPROC_GPU [] () { return cv::compile_args(cv::gapi::use_only{cv::gapi::imgproc::gpu::kernels()}); }
 }  // anonymous namespace
 
 namespace opencv_test