update skip macro to output only if test is disabled (#626)

test/backend_test.in.cpp

@@ -5370,7 +5370,6 @@ TEST(${BACKEND_NAME}, numeric_double_inf)
 
 TEST(${BACKEND_NAME}, abc_tbb)
 {
-    SKIP_TEST_FOR("GPU", "${BACKEND_NAME}");
     ONLY_ENABLE_TEST_FOR("CPU", "${BACKEND_NAME}");
 
     // Force TBB flow graph generation in the CPU backend

test/util/test_tools.hpp

@@ -36,11 +36,8 @@
 #define ONLY_ENABLE_TEST_FOR(backend_to_enable, current_backend)                                   \
     if (backend_to_enable != current_backend)                                                      \
     {                                                                                              \
+        NGRAPH_INFO << "Skipped test for " << current_backend;                                     \
         return;                                                                                    \
-    }                                                                                              \
-    else                                                                                           \
-    {                                                                                              \
-        NGRAPH_INFO << "Enabled test for " << current_backend;                                     \
     }
 
 namespace ngraph