* Started logger replacement in epc main.
* Replaced loggers in nas and s1ap.
* Replace loggers in nas statics.
* Replaced loggers in s1ap ctx mngmt.
* Replace loggers in s1ap erab mngmt.
* Replaced loggers in s1ap mngmt proc.
* Replaced loggers in s1ap nas transport.
* Replaced loggers in s1ap paging.
* Replaced loggers in mme.
* Replaced loggers in mme gtpc.
* Started removing logger injection in init functions and cleaned up argument passing to nas statics.
* Remove logger injection from mme and s1ap.
* Replaced loggers in the hss class.
* Replaced loggers in gtpc.
* Replaced loggers in GTPU and SPGW.
* Replaced loggers in MBMS.
This entails:
* Adding S1AP paging messaging to the MME.
* Adding the Downlink Data Notification, Donlink Data Notification Acknoledgment, and Downlink Data Notification Failure Messages.
* Adding the logic at the GTP-U to detect that Downlink Data notification needs to be sent.
* Proper handling of the new GTP-C messages at the MME GTPC and SPGW GTPC classes
* Add queuing mechanisms at the GTP-U while waiting for paging response. Queue is flushed when paging fails (timeout or other).
* Make sure eNB's SCTP information is properly stored.
* Make sure UE's GUTI information is properly stored.