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

Merge remote-tracking branch 'origin/develop-NR_SA_F1AP_5GRECORDS' into develop-NR_SA_F1AP_5GRECORDS

small changes for multiple lcid handling in gNB scheduler. PUSCH DTX handling and suspension of scheduling when UL failure is detected

# Conflicts:
#	common/utils/system.c

MR !1179 : Fix Incorrect Array Size computation  
MR !1182 : CI NSA test fixes and enhancements  
MR !1169 : Dataplane bug in L2NFAPI_NOS1

-If the gNB crashes when the X2 connection is established with the eNB, an sctp shutdown event is received from the eNB. However the x2 data related with
the connection were not removed from the RB tree. Then if the gNB tried to reconnect, it made the eNB exit because the eNB had kept the previous data.
Now we remove the x2 data as soon as the sctp shutdown event is received so that the eNB does not exit anymore at the next connection attempts.