(1) Device manager will drop packets (as the first step) if the topology...

(1) Device manager will drop packets (as the first step) if the topology indicates the packet-in port is not allowed for incoming transmissions. (2) Remove a log message from LinkDiscoveryManager. (3) Topology provides a service called isAllowed() that indicates if the port is enabled for incoming and outgoing traffic.  (4) Tests are modified accordingly.