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

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

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

Conflicts:
	cmake_targets/build_oai
	openair1/PHY/LTE_TRANSPORT/prach.c
	openair1/SCHED/phy_procedures_lte_ue.c
	targets/ARCH/COMMON/common_lib.h
	targets/RT/USER/lte-softmodem.c

Summary of changes:
- bug fix in the FlexRAN API (correct a check)
- bug fix for sending the right RNTI in a FlexRAN message
- fixes small bug in ulsim which kills one RX antenna in channel simulation.
  Another simple but bad bug in ulsch_demodulation.c (bad access of avgU
  array). This probably resulted in a performance degradation for non-ideal
  channels, even for 1 antenna. The avgU was read in position 1 instead of
  0 for 1-antenna and in positions 1 and 2 instead of 0 and 1 for 2-antennas.
- work from Nokia:
    1) shared library loader, with integration for oai devices, encoder and telnet server
    2) telnet server (use build-oai --build-telnetsrv option and --telnetsrv softmodem option)
    3) UE/eNB in different executables (lte-uesoftmodem and lte-softmodem + noS1 variants)
    4) config module fixes and extensions
    5) very preliminary NB-IoT integration preparation, using shared lib loader ( use make NB-IoT to build, after building the eNB softmodem)
    6) Rename NB-IoT configuration sources from nbiot_ to NB-IoT_ to be consistent with other NB-IoT developments.
- various bugs fixed:
  - try to avoid "buffer full" problem when pushing DL traffic
  - add a stop_rf function in the RU
  - cleanup - remove unnecessary calls to get_cpu_freq_GHz
    (was disrupting realtime at startup, generating lots of UU and LL)
  - cleanup MAC PDU generation

Compilation with Rel10 is not functional anymore.
Compilation of unitary simulator is not functional anymore.

End of line character has to be unix-style, not dos-style.

* bug fix in the FlexRAN API (correct a check)
* bug fix for sending the right RNTI in a FlexRAN message

fixes small bug in ulsim which kills one RX antenna in channel simulation.
Another simple but bad bug in ulsch_demodulation.c (bad access of avgU
array). This probably resulted in a performance degradation for non-ideal
channels, even for 1 antenna. The avgU was read in position 1 instead of
0 for 1-antenna and in positions 1 and 2 instead of 0 and 1 for 2-antennas.

Merge remote-tracking branch 'origin/develop-nbiotconf-shlibloader' into develop_integration_2018_w10

1) shared library loader, with integration for oai devices, encoder and telnet server
2) telnet server (use build-oai --build-telnetsrv option and --telnetsrv softmodem option)
3) UE/eNB in different executables (lte-uesoftmodem and lte-softmodem + noS1 variants)
4) config module fixes and extensions
5) very preliminary NB-IoT integration preparation, using shared lib loader ( use make NB-IoT to build, after building the eNB softmodem)
6) Rename NB-IoT configuration sources from nbiot_ to NB-IoT_ to be consistent with other NB-IoT developments.

This is hack-level development.

With this commit you can do UDP DL traffic of say 100Mb/s over
a 5MHz link with one connected UE and the eNB should not crash
because of memory exhaustion. Of course on the receiver side
you won't get 100Mb/s and many many lost packets. But the system
should not crash. 1Gb/s does not work. So in any case try to
remain within some reasonable limits. There is no reason to
push more than twice the maximum achievable throughput of
the link.

This work is based on a patch proposed by Francesco Gringoli.