testing with 2x2 and 4x4 with N310, small modifications in nr_ru_procedures and usrp_lib.cpp for multiple antennas

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

Conflicts:
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

Enable IP TUN interface configuration upon reception of PDU Session Establishment Accept NAS message

-User plane traffic validation with OAI UE and OAI CN:

-Downlink ping initiated from the CN is received at the IP interface of the UE. However it seems that there is some packet corruption preventing the generaration of ping reply.

-Uplink ping initiated from the UE reaches the OAI CN machine. However no ping reply is seen yet either.

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

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

Conflicts:
	openair1/PHY/NR_TRANSPORT/nr_prach.c

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

-Apply patch from Fujitsu
-Trigger dedicated RRC Reconfiguration with DRB and SRB2 configuration once the PDU session is established
-Validation of control plane sequence with OAI CN and Nokia SA Box

CU/DU support for most recent changes. UE continues as far as in monolithic mode. Still to apply masterCellGroupConfig in DU from RRCReconfiguration. This has to be detected in DU and applied after decoding the RRC message intended for UE.

handling of SDAP header, move RAR to slot last DL slot in TDD period (need change in configuration file)

Conflicts:
	executables/nr-ru.c
	openair1/SCHED_NR/phy_procedures_nr_gNB.c
	openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c

changes in gtpu interface for testing, small changes in L1 for PUSCH signal/noise measurements. SRB2 interfaces.

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

Merge branch 'NR_SA_F1AP_5GRECORDS' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_F1AP_5GRECORDS

Include second RRC Reconfiguration message to carry DRB, SRB2 configuration and NAS PDU Session Establishment Accept message

-Remove DRB and SRB configuration from the first RRC Reconfiguration message. Missing radio configuration to be filled in first RRC Reconfiguration message.