Skip InferROI.TestStreamingInfer as unstable as it hangs on CI time-to-time.

modules/gapi/test/infer/gapi_infer_ie_test.cpp

@@ -1649,6 +1649,9 @@ TEST(Infer, TestStreamingInfer)
 
 TEST(InferROI, TestStreamingInfer)
 {
+    if (cvtest::skipUnstableTests)
+        throw SkipTestException("Skip InferROI.TestStreamingInfer as it hangs sporadically");
+
     initDLDTDataPath();
 
     std::string filepath = findDataFile("cv/video/768x576.avi");