Add resource API to query registered resource

Change-Id: Ibf53a0fa383043d17e78578093eb3055631796d0
diff --git a/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/MockResourceService.java b/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/MockResourceService.java
index 16c3c9b..a41616b 100644
--- a/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/MockResourceService.java
+++ b/core/net/src/test/java/org/onosproject/net/intent/impl/compiler/MockResourceService.java
@@ -101,6 +101,11 @@
     }
 
     @Override
+    public Collection<Resource> getRegisteredResources(Resource parent) {
+        return getAvailableResources(parent);
+    }
+
+    @Override
     public boolean isAvailable(Resource resource) {
         return true;
     }