fix phy simulators build Pb: move snr_dB global to simulation code, add a channel mode section in configuration for snr_dB ,add a parameter flag in the config module to allow omitting prefix when modifying a parameter (for compatibility of -s option)

add channel model option to rfsimulator and prevent common libraries re-compilation when using both --UE --eNB options in build_oai script

add config options for rfsimulator, set a common lib for l1sim and rfsimulator, avoid simulation sources to be added twice in some execs (tau.c)

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

See merge request oai/openairinterface5g!649

Develop: Integration 2019 Week 30
Master Branch Release v1.1 Candidate

The following Merge Requests are included:

* MR 630 : nfapi interface bug fixes
* MR 638 : X2 HO (tdd, forwarding, end marker)
* MR 646 : Loadtester bugfixes
* MR 647 : fix power estimation
* MR 648 : CI: X2 Handover Testing

CI: adding support to repeat scenario in case of failure.

See merge request oai/openairinterface5g!645

    nice when the tested feature is known to be unstable
    CDRX testing is now separated from normal FDD 10MHz testing
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

CI:  Downgrade cdrx testing

See merge request oai/openairinterface5g!643

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>

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

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

develop integration branch: 2019 week 28

See merge request oai/openairinterface5g!640

* MR 635 : fix rfsim ue sync
* MR 636 : Bugfixes 2019 w28
* MR 637 : Fixing Multi-RRU support and CI Testing
* MR 639 : fix bladeRF compilation

Merge remote-tracking branch 'origin/ci-develop-multi-rru-support' into develop_integration_2019_w28

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>

The 5G phone OPPO has a very big UE capability (> 2KB).

We need bigger buffers to transfer this, especially in x2 handover.

Also the sctp messages need a bigger buffer.

Note: in sctp, we didn't check for partial messages, it's now
      done. When detected, we exit. To be redone differently
      if needed. (Look for "if (!(flags & MSG_EOR))".)

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

We declare variables in header files, we don't define them. So we need
to use 'extern' in the header file and put the definition
in some C file.