Merge pull request #339 from kwanggithub/master

...va/net/floodlightcontroller/core/internal/Controller.java

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

...t/floodlightcontroller/learningswitch/LearningSwitch.java

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

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

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

src/main/java/org/openflow/util/HexString.java

src/main/resources/learningswitch.properties

...et/floodlightcontroller/core/internal/ControllerTest.java

...oodlightcontroller/learningswitch/LearningSwitchTest.java

...t/floodlightcontroller/topology/TopologyInstanceTest.java