ENDC: Add X2AP initial configuration and X2AP task in nr-softmodem. Small issue with parsing NRCCPARAMS_DESC from RCconfig_NR_X2() needs to be resolved

ENDC: Reverse the role of eNB and gNB for the ENDC X2 setup procedure. Currently, gNB: slave sending the setup request, eNB:master.

 Conflicts:
	openair2/RRC/LTE/MESSAGES/asn1_msg.c

- send RRC Connection Reconfiguration with dummy ENDC data by doing:
  telnet localhost 9001
  and press enter when the ENDC UE is connected to the eNB to send it

develop-nr integration branch: 2019 week 40

The following MRs have been merged:

* MR 675 : code clean-up, remove RRC_VERSION macros and more
* MR 677 : fix for LTE X2 HO

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

Merge remote-tracking branch 'origin/issue141_remove_LTE_RRC_VERSION' into develop-nr-integration-2019-w40

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

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

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

remove RRC_VERSION macros, simplify build-oai and CMakefile.txt accordingly, get rid of remaining compilation warnings (opt module improperly merged and patch asn1c files with tests against max 64 bits integer value)

it was 'NR_Rel15' and now it is 'RRC_NR_Rel15'

nFAPI fix for L2 nFAPI simulator.

See merge request oai/openairinterface5g!670

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

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

Integration develop nr w37

See merge request oai/openairinterface5g!668

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

Conflicts:
	executables/nr-ru.c
	nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface.h

Merge remote-tracking branch 'origin/443-add-support-to-create-vcd-files-in-develop-nr' into integration_develop-nr_w37

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

fixing a bug in the allocation of the UE HARQ structures that was causing a segfault. Fixing some compiler warnings

Resolve "Problems transmitting data via NR-PDSCH"

See merge request oai/openairinterface5g!658

hotfix: replacing msg with printf in unitary simulators (msg(...) was replaced with LOG_D(PHY,...) but it was used before log was initialized)

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

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

- changed Mdlharq to Mlimit when comparing with the round number
- Not incrementing the HARQ round in case of err_flag = 1, until HARQ is implemented
- Changed MAX_LDPC_ITERATIONS to 5 from 4 (provided better performance)

- Setting the payload to random data instead of all zeros at the Tx side

- Handling "nb_symb_sch" equal to 0 in "phy_procedures_nrUE_RX" which prevents
  entering "nr_ue_pdsch_procedures"

- Handling symbol loop problem in "nr_ue_pdsch_procedures"

- Handling resource block loop problem in "nr_rx_pdsch"

Develop nr merge

See merge request oai/openairinterface5g!588