Fix DebugCounter related things in core.web. Other misc optimizations in core.web.

...lightcontroller/core/web/AllSwitchStatisticsResource.java

...dlightcontroller/core/web/ControllerSwitchesResource.java

...va/net/floodlightcontroller/core/web/CoreWebRoutable.java

...va/net/floodlightcontroller/core/web/CounterResource.java

...tcontroller/core/web/SwitchCounterCategoriesResource.java

.../floodlightcontroller/core/web/SwitchCounterResource.java

...net/floodlightcontroller/core/web/SwitchRoleResource.java

...t/floodlightcontroller/debugcounter/DebugCounterImpl.java

...oodlightcontroller/debugcounter/DebugCounterResource.java

.../net/floodlightcontroller/debugcounter/IDebugCounter.java

...lightcontroller/debugcounter/MockDebugCounterService.java

.../floodlightcontroller/flowcache/FlowReconcileManager.java