[ONOS-7684] Support VM Live Migration (VxLAN + VLAN)

Change-Id: I4717f0af6731b41eaf3114994f2087af74c3e3f5
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortService.java
index f5ebe11..d462e1b 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortService.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/InstancePortService.java
@@ -66,4 +66,18 @@
      * @return set of instance ports; empty list if no port exists
      */
     Set<InstancePort> instancePorts(String osNetId);
+
+    /**
+     * Processes instance port addition event caused by VM migration.
+     *
+     * @param port instance port
+     */
+    void migrationPortAdded(InstancePort port);
+
+    /**
+     * Processes instance port removal event caused by VM migration.
+     *
+     * @param port instance port
+     */
+    void migrationPortRemoved(InstancePort port);
 }