Group event indicating failover of previously used live port

Change-Id: I32749b38d5e4fab93fa97bbf6587bd0dc91db88c
diff --git a/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java b/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java
index ff08f72..cc2cd39 100644
--- a/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java
+++ b/providers/openflow/group/src/test/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProviderTest.java
@@ -201,6 +201,10 @@
             this.groups = groupEntries;
         }
 
+        @Override
+        public void notifyOfFailovers(Collection<Group> groups) {
+        }
+
         public Collection<Group> getGroupEntries() {
             return groups;
         }