* decouple EUTRA and NR stack classes
* implement dummy X2 interface with control and data plane methods
* implement eNB time source interface that PHY calls
the code hasn't been maintained for a while an likely needs to be
adapted for a real-world scenarios.
in order to avoid having to maintain two MAC/PHY interfaces we
remove the code from now.
* - Started porting the enb PHY layer to use srslog loggers.
- Updated srslog to manage the none level.
* Finished porting enb phy layer including the NR part.
* Ported MAC, GTPU, PDCP, RLC and S1AP enb classes to use srslog.
* Use new stack logger.
* Ported the enb RRC clases to use srslog.
* Remove unused log macros.
* Replace loggers in sched, sched_carrier, sched_helpers.
* Replaced loggers in sched grid.
* Replaced loggers in sched harq.
* Replaced loggers in sched ue.
* Replaced loggers in sched ue ctrl.
* Replace loggers in sched ue ctrl TPC.
* Replaced loggers in sched subclasses.
* Replaced loggers in rrc_meascfg_test
* Configure loggers in rrc_mobility_test.
* Fix compilation errors left out after the rebase.
* - Implement a custom log sink that will serve as a test spy to intercept and count the number of error and warning log entries.
- Adapt the erab_test_setup and rrc_mobility tests to use this new class and make them pass again.
* - Remove trailing new lines introduced in the rebase.
- Ported the sched_ue_cell class to srslog.
* Remove unused log member.
* Ported mac tests to srslog.
* - Removed remaining trailing newlines from log entries.
* Fix compiler errors detected in CI.
* Fix another static variable without definition passed to log lines.
* Fixed a bug in srslog::flush that would never end when the backend queue is full.
* Fetch the RRC logger instead of injecting it in the constructor.
* Refactor NR resource allocation classes. Use DCI instead of grant for dummy PDSCH UE/eNB test
* Minor refactors in NR workers and ue_dl
* Fix include issues
* fix compilation issues