Refactor NodePortTuple

...va/net/floodlightcontroller/core/types/NodePortTuple.java

...net/floodlightcontroller/core/web/SwitchResourceBase.java

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

...ller/devicemanager/internal/DeviceSyncRepresentation.java

.../java/net/floodlightcontroller/forwarding/Forwarding.java

...dlightcontroller/linkdiscovery/ILinkDiscoveryService.java

...ntroller/linkdiscovery/internal/LinkDiscoveryManager.java

...a/net/floodlightcontroller/loadbalancer/LoadBalancer.java

...java/net/floodlightcontroller/routing/ForwardingBase.java

src/main/java/net/floodlightcontroller/routing/Route.java

...a/net/floodlightcontroller/topology/TopologyInstance.java

...va/net/floodlightcontroller/topology/TopologyManager.java

...oodlightcontroller/topology/web/BlockedPortsResource.java

...controller/topology/web/BroadcastDomainPortsResource.java

...oodlightcontroller/topology/web/EnabledPortsResource.java

.../net/floodlightcontroller/topology/web/RouteResource.java

...loodlightcontroller/topology/web/TunnelLinksResource.java

...in/java/net/floodlightcontroller/util/OFMessageUtils.java

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

...a/net/floodlightcontroller/forwarding/ForwardingTest.java