* 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.
* first step towards moving MAC timers to stack. Mac is still using its own timers. srslte::timers class can be restructured.
* moved timers out of the UE MAC
* Adding timer creation at NAS using timerfd_create
* Adding the ability to add and remove the timer file descriptor to the MME main select loop
* Adding the ability to the MME for the NAS to check if a timer is running
* Adding the timer expiry handling functionality at the MME