vertical feedback path for Role replies

Change-Id: I31bdb85f90901ec79147adeea0df8ceae00ed1dc
diff --git a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java
index 53a49b6..018d6f3 100644
--- a/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java
+++ b/providers/openflow/flow/src/main/java/org/onlab/onos/provider/of/flow/impl/OpenFlowRuleProvider.java
@@ -302,7 +302,10 @@
         }
 
         @Override
-        public void roleAssertFailed(Dpid dpid, RoleState role) {}
+        public void receivedRoleReply(Dpid dpid, RoleState requested,
+                RoleState response) {
+            // Do nothing here for now.
+        }
 
         private synchronized void pushFlowMetrics(Dpid dpid, OFStatsReply stats) {
             if (stats.getStatsType() != OFStatsType.FLOW) {