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.

This used to be done to ease power estimation in the UE,
but this is not correct. Let's put no energy in the REs
with no DCI data, which is what needs to be done.

Plus it consumes a lot of CPU because of calling taus()
way too much.

To be used when you send data to another host.

On the other host, to avoid ICMP traffic about the port
not being open, do:

./nc -l -u -p 9999 > /dev/null

You need to restart this command each time you run macpdu2wireshark.
You can use any other program that will accept UDP packets on the
port 9999 (default port of macpdu2wireshark, change if you use another
port of course).

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>

   --> impact on performance -- disabling iperf testing
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/bugfix-pucch-power-estimation' into develop_integration_2019_w30

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