gnb(nos1) and ue(nos1) is ok,ue read tun send to gnb by rfsim and gnb write that data to oaitun_enb1(ifconfig can descover RX packet rise); gnb(s1) and ue(nos1) can send initialuemessage to amf

Merge branch 'NR_SA_NGAP_RRC_wk42' of https://gitlab.eurecom.fr/oai/openairinterface5g into NR_SA_NGAP_RRC_wk42

Conflicts:
	openair2/RRC/NR/MESSAGES/asn1_msg.c
	openair2/RRC/NR/nr_rrc_proto.h
	targets/COMMON/create_nr_tasks.c

Integration 2020 wk45 (2) comprising:

MR937:Nr dl sched fixes  
-restore old phytest scheduler behavior
-correct TA scheduling
-correct SSB
-shorten interface of `nr_fill_nfapi_dl_pdu()`
-Track RB allocation on symbol basis (bitmap)
-add a `remove_nr_ue_list()`, could be used instead of MR !934

MR910:5G SA NAS messages 
- 5G SA nass messages and a simple unitary test code
 
MR927:Nr rrc configuration fr2
- introduces some bug fixes for FR2 that might also have an impact on FR1.

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

 Conflicts:
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c