Add distributed persistent store and manager for instance port

Change-Id: I9a4ba11a3e0fb494aedf9cb35c2e9a7a7bcbf5c7
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortEvent.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortEvent.java
index 4276cf2..434aa2d 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortEvent.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortEvent.java
@@ -50,7 +50,17 @@
         /**
          * Signifies that the instance is migration is ended.
          */
-        OPENSTACK_INSTANCE_MIGRATION_ENDED
+        OPENSTACK_INSTANCE_MIGRATION_ENDED,
+
+        /**
+         * Signifies that the instance is terminated.
+         */
+        OPENSTACK_INSTANCE_TERMINATED,
+
+        /**
+         * Signifies that the instance is restarted.
+         */
+        OPENSTACK_INSTANCE_RESTARTED,
     }
 
     /**