Added the next round of OF-DPA features. None of this has been tested yet, but...

Added the next round of OF-DPA features. None of this has been tested yet, but we are closer to a learning-switch capable OF-DPA switch as programmed from Floodlight. There are a few utility functions in OFDPAUtils that allow for the installation of the required OF-DPA groups and flows so that the switch can be treated as an (almost) normal switch from the perspective of Forwarding/LearningSwitch. There is a utility function that will need to be used to make sure the instructions, matches, and table ID are correct though. This has been done, and hopefully works well. Included with this commit are OFPortMode and OFPortModeTuple, which help to keep track of OFPorts that are in either trunk or access modes. This impacts the groups to be used by OF-DPA.