Handle host move learning

...dlightcontroller/devicemanager/IDeviceManagerService.java

.../net/floodlightcontroller/devicemanager/IEntityClass.java

...floodlightcontroller/devicemanager/IEntityClassifier.java

...oller/devicemanager/internal/DefaultEntityClassifier.java

...t/floodlightcontroller/devicemanager/internal/Device.java

...tcontroller/devicemanager/internal/DeviceManagerImpl.java

...t/floodlightcontroller/devicemanager/internal/Entity.java

...lightcontroller/devicemanager/internal/IndexedEntity.java

...a/net/floodlightcontroller/topology/ITopologyService.java

.../floodlightcontroller/topology/internal/TopologyImpl.java

...troller/devicemanager/internal/DeviceManagerImplTest.java