- RA resource selection and transmission
- MAC header structs for RA
- RA procedure msg1 fixes
- code cleanup

- Updated PRACH procedures and general code formatting
- gNB msg1 handling and RAR generation
- general bug fixing
- formatting
- missing headers
- RAR handling.

Bugfix: 1. fix the initial memory allocation; 2. correct the generation of the prach signal according to specs

1. assertion relax for preamble format 3; 2. memset bugfix for RB=106; 3. repetition bugfix for format A3 and B3

Conversion from the peak detection to the TA value, considering the numerology, N_RB and the sampling rate

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

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

Conflicts:
	executables/nr-gnb.c
	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

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

Develop Integration Branch : 2020 week 05

The following Merge Requests have been included :

* MR[702] : Add PUSCH-based TA updates (5G-NR)
* MR[764] : fix segv in drs_modulation.c (4G-LTE-UE)
* CI Python Framework improvement (X2 OpenAirCn Handover)
* Some Compilation warnings fixed