MR !1188 : NR_gNB_initial_MIB_fix  
This MR fixes a bug for which the gNB would send an empty MIB in the first frames of execution. This is because MIB is generated every 8 frames but the first MIB wouldn't be generated before frame 8 at the beginning of each run.

MR !1184 : x2_handle_sctp_shutdown
Avoid eNB exiting after gNB tries to reconnect over X2 for NSA

This reverts commit b38cc832.

Merge branch 'develop' of gitlab.eurecom.fr:oai/openairinterface5g into x2_handle_sctp_shutdown

Initial implementation of NR5G Standalone Access Registration procedures with CN5G.

Integration 2021 wk25

MR !1187 : improve UE module control
* improve UE module control
* make Qlog generation optional
* add nsa tests
* update jenkins pipeline

This reverts commit 0cd35686