An NR-capable UE will transmit some NR measurements.
Once received, the whole process on nr-cell addition is started.
It will fail quickly.

Many things are still missing.

What is not handled properly with this commit:
- in x2ap_eNB_handle_sgNB_add_req we hardcode the gNB ID
- nr triggering is done if we receive a measurement but this measurement is
  not analyzed at all
- no timers (T_dc_overall, T_dc_prep) and as is the code fails and then the
  next triggering after UE reconnection will not work (x2 ID are not well
  handled here and there in the code)

Note also that the gNB part has not been looked at all for this commit.

This is work in progress...

many things hardcoded, to be refined

Merge branch 'nr-dual-connectivity' of https://gitlab.eurecom.fr/oai/openairinterface5g into nr-dual-connectivity

Merge branch 'nr-dual-connectivity' of https://gitlab.eurecom.fr/oai/openairinterface5g into nr-dual-connectivity

use:
     type *x = calloc(1, sizeof(*x));
everywhere to avoid bad types inside the sizeof.

Merge branch 'nr-dual-connectivity' of https://gitlab.eurecom.fr/oai/openairinterface5g into nr-dual-connectivity

set MAX_MOBILES_PER_ENB to 4, to be same value as NUMBER_OF_UE_MAX.
Maybe we should set NUMBER_OF_UE_MAX to 16 instead?

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

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

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

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

preparing l2_init_ue and l3_init_ue to make sure parameters are passed down. To be merged with Francesco's changes and tested.

Conflicts:
	openair1/PHY/NR_TRANSPORT/nr_dlsch.h
	openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
	openair1/PHY/NR_UE_TRANSPORT/dci_nr.c
	openair1/PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h
	openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
	openair1/SIMULATION/NR_PHY/dlschsim.c
	openair1/SIMULATION/NR_PHY/dlsim.c
	openair2/COMMON/platform_constants.h
	openair2/LAYER2/NR_MAC_UE/mac_defs.h
	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

definition of config request fapi structures in UE and acquisition from rrc of config data (work in progress)

Integration develop-nr 2020 week 02

See merge request oai/openairinterface5g!751

This integration branch contains the following MRs

* MR [706] : Merging develop tag `2019.w44` into develop-nr
* MR [746] : some cppcheck fixes and also compilation warnings removal
* MR [750] : hotfix: fix value of MAX_MOBILES_PER_ENB

Also contains an hotfix for the UHD thread priority

DOC: CI documentation updated for 5G-NR
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

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