Merge remote-tracking branch 'origin/develop_integration_2018_w25' into develop

Summary of changes:
- import work from Fujitsu:
    - multiple UEs
    - TDD configuration 1
- several bugs fixed:
    - UE power changes
      this one introduces two new parameters in the configuration file,
      update yours! The new parameters are "puSch10xSnr" and "puCch10xSnr".
      See targets/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.50PRB.usrpb210.conf
    - IQ replay module
    - use MAKE_VERSION(x,y,z) instead of RRC_VERSION
    - some UE fixes

Some new problems may happen. The work from Fujitsu was huge
and their branch diverged a lot from develop, leading to a very
complex merge.

The UE power management may also have an impact. It expects the noise
level to be at around 30 (as seen in the enb T tracer, in the
"input signal" view) and asks for an SNR of 20dB (value 200 for puSch10xSnr
and puCch10xSnr in the configuration file). You may want to put a
lower value, say 100 (SNR of 10dB). This is still work in progress
and needs some more work (we need to calculate the noise level at
runtime and not use a hardcoded value of 30).