Implement event notification of resource event

When a resource is registered or unregistered, a resource event is notified

Change-Id: I40e66761966ef2126366424a14bb3193fc850e5a
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 06b2c81..8ec09bd 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
@@ -19,6 +19,7 @@
 import org.onlab.packet.MplsLabel;
 import org.onosproject.net.newresource.ResourceAllocation;
 import org.onosproject.net.newresource.ResourceConsumer;
+import org.onosproject.net.newresource.ResourceListener;
 import org.onosproject.net.newresource.ResourcePath;
 import org.onosproject.net.newresource.ResourceService;
 
@@ -97,4 +98,10 @@
     public boolean isAvailable(ResourcePath resource) {
         return true;
     }
+
+    @Override
+    public void addListener(ResourceListener listener) {}
+
+    @Override
+    public void removeListener(ResourceListener listener) {}
 }