relay BACKUPS_CHANGED as ReplicaInfo

Change-Id: I72abd05e7d2d4a2c448323ad304c8f21b1d6a90b
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoEvent.java b/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoEvent.java
index c956c8a..ef4de4d 100644
--- a/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoEvent.java
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/flow/ReplicaInfoEvent.java
@@ -36,7 +36,7 @@
          */
         MASTER_CHANGED,
         //
-        // BACKUPS_CHANGED?
+        BACKUPS_CHANGED,
     }