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

Develop integration: 2020 week 33

The following Merge Requests are included:

* MR [849] : Implement Message2 (RAR) reception for NR-UE
* MR [870] : Fix softmodem restart
* MR [871] : Fix support for MIMO in rf-simulator
* MR [873] : BUILD: fix for new API on load_softscope

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

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

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

fixed channel model initialization in rfsimulator for added parameter (to be added to bridge structure still)

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

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

Conflicts:
	targets/ARCH/rfsimulator/simulator.c

See merge request oai/openairinterface5g!869

Develop Integration Branch : 2020 week 31

The following Merge Requests have been included:

* MR [861] : Fixes for buffer overrun when L1 information is cleared upon UE removal in
* MR [863] : Small fixes
* MR [864] : Fixed the bug no supporting CellId more than 256
* MR [865] : Fix to have the sony 5g connect in NSA mode
* MR [867] : CI improvements for OCP-enb testing and NSA FR1 testing
* MR [868] : Add chansimuparams

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

Set n_dmrs_cdm_groups = 1 for now.
Should be fixed accordingly to TS 38.214 section 5.1.6.2
using tables 7.3.1.2.2-1, 7.3.1.2.2-2, 7.3.1.2.2-3, 7.3.1.2.2-4 of TS 38.212