Merge changes Ic442b16e,Ibeb2c05b,Ibadb787a,I5fd9b5dd,Ia751f131, ...

* changes:
  Fixed exception handling when shutting down a COPS/Ccaps connection.
  Had to change the key to a map from a yang generated class to the object's ID. This issue may be due to some unintended changes to the code responsible for generating the data model that seem to surround the generated hashCode() method.
  Refactor shared attributes and methods to the PEP agent super COPSPepAgent.
  Refactor of PDP Agent code. Moved shared functionality up the the super COPSPdpAgent. Clarified purpose of the class by removing the extension of the Thread class as the agent is responsible for creating the persistent connection via the COPSPdpConnection class not itself. It appears that the class was originally meant handle COPS messages at one point but the run() method or extension of Thread was never removed after adding the connection object.
  Complete PDP connection refactor. Fixed error handling in run() and moved the addition of new state managers up to the super.
  Moved all identical attributes and methods from COPSPdpConnection & COPSPepConnection to COPSConnection.
  Completed COPS PEP request state manager refactor primarily to remove redundant code.
  Generalize COPSPepOSConnection as a COPSPepConnection. Removed duplicated logic up to the super.
  Fix class javadoc comment.
  Moving COPSPepOSDatatProcess down the class hierarcy. This is a necessary step in the PEP connection and state manager refactor.
  Completed COPS state manager refactor. Removed duplicated logic from sub-classes.
  Extending the PCMMPdpConnection from COPSPdpConnection. Removed identical methods from PCMMPdpConnection that were contained in COPSPdpConnection.
  Refactor COPS PDP connection classes. Moved much of the OS connection methods up to the super as it was primarily duplicated code.
  Generalize PDP Data Process classes. This step is required to further generalize the other PDP PCMM service classes such as the state managers and connection classes.