SONAR suggestion - explicit break in switch statements

Change-Id: Ib648192fe84f37947936592c4635397706b14377
diff --git a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
index b007af1..cfaf107 100644
--- a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
+++ b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
@@ -1471,6 +1471,7 @@
                         if (((OFErrorMsg) msg).getErrType() == OFErrorType.PORT_MOD_FAILED) {
                             LOG.error("port mod failed");
                         }
+                        break;
                     default:
                         break;
                 }