Cleanup of state managers' interfaces (constructor and init).

Cleanup of state managers' interfaces (constructor and init).
All state managers now will be constructed with a socket object and removed the socket from the initialization routine for PEP managers and removed the initialization routine completely from the PDP managers. Additionally, moved out the logic to process a gate request placed in earlier into COPSPepReqStateMan while testing the packetcable-policy-server. In lieu of removing the aformentioned logic, I also deactivated the PCMMServiceTest#testAddAndRemoveUpGate() test case which will be reactivated after CmtsPepReqStateMan is checked in with additional PCMMService tests.

Change-Id: I2b4c65efd35957f1d2d25aefa0270f95d1800559
Signed-off-by: Steven Pisarski <s.pisarski@cablelabs.com>