flow reconciliation: device move/ link down cases handling

src/main/java/net/floodlightcontroller/devicemanager/internal/DeviceManagerImpl.java

@@ -353,10 +353,12 @@ IFlowReconcileListener, IInfoProvider, IHAListener {
             ipv4Address = null;
         Entity e = new Entity(macAddress, vlan, ipv4Address, switchDPID,
                               switchPort, null);
+        /**
         if (!allKeyFieldsPresent(e, entityClassifier.getKeyFields())) {
             throw new IllegalArgumentException("Not all key fields specified."
                       + " Required fields: " + entityClassifier.getKeyFields());
         }
+        */
         return findDeviceByEntity(e);
     }