added call to NAS for RRCSetupComplete message in UE. other minor modification in gNB/UE scheduling for SA

Conflicts:
	openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
	openair2/LAYER2/NR_MAC_gNB/config.c
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c

UE Configuration after SIB1 ok, RAR configuraiton/reception ok, Msg3 transmission / reception ok, CU fails when needing to at SRB1

# Conflicts:
#	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c

MR !1085 : Nr mac ssb
-MAC scheduling of multiple SSBs
-Symbol level occupation of VRB map for SSBs
-Multi SSB SIB1 scheduling

MR !1097 : NR_PRACH: nr_du\[\] buffer not filled in High Speed case for both gNB and nrUE
Issue: TC nr_prachsim failed with High Speed(-H) enabled.
While generating NR PRACH for High Speed case : Array nr_du\[\] was not filled for both gNB and nrUE. Added function nr_fill_du() to resolve the issue. 

MR !1107 : Small bugfixes for 5G NR

also enabling connection to AMF only when --sa option is used.

MR !1092: Nr pdcp nia2 integrity
This code has not been tested with a COTS UE. We need SRB1/2 (so we need SA) to test.
The activation of security and integrity for SRB1 will need more code (new functions) because it happens after some time, not at creation time of the PDCP entity and there is no way to do this with current code.
 
MR !1075: Fft bench hotfix 
Simple fix to make the FFT testbench compile and run on current develop.

MR !1083: NR power measurement fixes

Conflicts:
	executables/nr-softmodem.c
	executables/nr-ue.c
	openair2/GNB_APP/gnb_app.c
	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

If the array of pointers is allocated using malloc(), it is not guaranteed that the pointers are NULL, so the actual PHY_VARS_gNB might nit be allocated correctly!
Also replace a malloc() + memset() combination by just a calloc().

# Conflicts:
#	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
#	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
#	openair2/RRC/NR/rrc_gNB_reconfig.c

This code has not been tested with a COTS UE. We need SRB1/2 (so we need SA)
to test.

The activation of security and integrity for SRB1 will need more code
(new functions) because it happens after some time, not at creation time
of the PDCP entity and there is no way to do this with current code.