Fixing an issue where intents fail to re-route after a node is restarted; caused by failure to register intent resources correctly.

Change-Id: I239e3b538d5b9134422fa629514e095e4914bb0c
diff --git a/core/api/src/main/java/org/onosproject/net/intent/IntentStoreDelegate.java b/core/api/src/main/java/org/onosproject/net/intent/IntentStoreDelegate.java
index a40ea99..dcb7469 100644
--- a/core/api/src/main/java/org/onosproject/net/intent/IntentStoreDelegate.java
+++ b/core/api/src/main/java/org/onosproject/net/intent/IntentStoreDelegate.java
@@ -29,4 +29,12 @@
      * @param intentData    intent data object
      */
     void process(IntentData intentData);
+
+    /**
+     * Called when a new intent has been updated for which this node is the master.
+     *
+     * @param intentData intent data object
+     */
+    default void onUpdate(IntentData intentData) {
+    }
 }