Fix SONA to deal with PORT_UPDATED event when port is enabled.

Change-Id: Id173f377d4f3f3d295b48346a6e79856247951ef
diff --git a/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSwitchingHostManager.java b/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSwitchingHostManager.java
index 8bec3d1..f3d81db 100644
--- a/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSwitchingHostManager.java
+++ b/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSwitchingHostManager.java
@@ -263,6 +263,8 @@
                 case PORT_UPDATED:
                     if (!event.port().isEnabled()) {
                         deviceEventExecutor.execute(() -> processPortRemoved(event.port()));
+                    } else if (event.port().isEnabled()) {
+                        deviceEventExecutor.execute(() -> processPortAdded(event.port()));
                     }
                     break;
                 case PORT_ADDED: