first commit for new flow reconciliation design

.../java/net/floodlightcontroller/devicemanager/IDevice.java

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

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

...n/java/net/floodlightcontroller/flowcache/FCQueryObj.java

.../floodlightcontroller/flowcache/FlowReconcileManager.java

...net/floodlightcontroller/flowcache/IFlowCacheService.java

...floodlightcontroller/flowcache/IFlowReconcileService.java

...net/floodlightcontroller/flowcache/PendingSwitchResp.java

...loodlightcontroller/flowcache/PortDownReconciliation.java

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

...dlightcontroller/virtualnetwork/VirtualNetworkFilter.java