Added one more Component Config REST API; for specified component and variable.

Change-Id: I810aa90636c55c8b05c146780ad28c307cefff33
diff --git a/core/store/dist/src/test/java/org/onosproject/store/intent/impl/GossipIntentStoreTest.java b/core/store/dist/src/test/java/org/onosproject/store/intent/impl/GossipIntentStoreTest.java
index 54f361e..149e64b 100644
--- a/core/store/dist/src/test/java/org/onosproject/store/intent/impl/GossipIntentStoreTest.java
+++ b/core/store/dist/src/test/java/org/onosproject/store/intent/impl/GossipIntentStoreTest.java
@@ -276,5 +276,10 @@
         public void unsetProperty(String componentName, String name) {
 
         }
+
+        @Override
+        public ConfigProperty getProperty(String componentName, String attribute) {
+            return null;
+        }
     }
 }