ONOS-6825: added OFAgent tracer

Change-Id: Ib04184b5fe108c636f8fb9c4b721a1004b72c0a7
diff --git a/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java b/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java
index 16369e0..ac4ce41 100644
--- a/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java
+++ b/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java
@@ -28,6 +28,8 @@
 import org.onosproject.event.EventListener;
 import org.onosproject.event.EventSink;
 import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.incubator.net.virtual.TenantId;
+import org.onosproject.incubator.net.virtual.VirtualNetwork;
 import org.onosproject.incubator.net.virtual.VirtualNetworkService;
 import org.onosproject.incubator.net.virtual.VirtualNetworkServiceAdapter;
 
@@ -254,6 +256,16 @@
         }
 
         @Override
+        public VirtualNetwork getVirtualNetwork(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
+        public TenantId getTenantId(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
         public ServiceDirectory getServiceDirectory() {
             return serviceDirectory;
         }