allow for test exclusion to include backend name (#2622)

test/util/test_control.cpp

@@ -52,7 +52,9 @@ string ngraph::prepend_disabled(const string& backend_name,
             }
         }
     }
-    if (blacklist.find(test_name) != blacklist.end())
+    string compound_test_name = backend_name + "." + test_name;
+    if (blacklist.find(test_name) != blacklist.end() ||
+        blacklist.find(compound_test_name) != blacklist.end())
     {
         rc = "DISABLED_" + test_name;
     }

test/util/test_control.hpp

@@ -120,7 +120,9 @@ namespace ngraph
                     ::testing::internal::CodeLocation(__FILE__, __LINE__))                         \
                 ->AddTestPattern(                                                                  \
                     #backend_name "/" #test_case_name,                                             \
-                    ::ngraph::prepend_disabled(#test_case_name, #test_name, s_manifest).c_str(),   \
+                    ::ngraph::prepend_disabled(                                                    \
+                        #backend_name "/" #test_case_name, #test_name, s_manifest)                 \
+                        .c_str(),                                                                  \
                     new ::testing::internal::TestMetaFactory<NGRAPH_GTEST_TEST_CLASS_NAME_(        \
                         backend_name, test_case_name, test_name)>());                              \
             return 0;                                                                              \