ONOS-7077 Openflow 1.5 OXS and stat trigger support

Change-Id: I006bcd3d8eac451a780c7e5c69a12298ead14281
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkFlowRuleManagerTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkFlowRuleManagerTest.java
index c447755..584401e 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkFlowRuleManagerTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkFlowRuleManagerTest.java
@@ -465,6 +465,11 @@
         }
 
         @Override
+        public Instructions.StatTriggerInstruction statTrigger() {
+            return null;
+        }
+
+        @Override
         public Instructions.MeterInstruction metered() {
             return null;
         }