SONAR suggestion - explicit break in switch statements

Change-Id: Ib648192fe84f37947936592c4635397706b14377
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java
index 0e4f7ab..64141b2 100644
--- a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSwitchingHostProvider.java
@@ -248,6 +248,7 @@
                                 event.subject().id());
                         processPortRemoved(event.port());
                     });
+                    break;
                 default:
                     break;
             }