TM2 now takes rho_a and rho_b power scaling factors into account

It creates more problems than it solves.

We replace this approach by a straightforward
synchronous one.

Now in the downlink, at frame f and subframe s
we use HARQ process (f * 10 + s) % 8.
This is similar to uplink scheduling.

set transmission mode in phy_config_dedicated_[UE|eNB] after RRCConnectionReconfiguration(eNB) and RRCConnectionReconfigurationComplete(UE)

add ue_TransmissionMode in RrcConfigurationReq

added ue_transmission_mode and nb_antenna_ports to eNB config file

transmisison mode gets set with RRCReconfiguration

That led to uplink two resource blocks to fail being decoded (not always),
due to wrong channel estimation. (As was the previous hotfix for five
resource blocks.)

This commit also includes some cleanup of some historical code that is
not relevant anymore.

the bigger prime number lower than 60 is 59, not 50

- update T_messages.txt
- update call sites of the T for thoses traces

(the T macro is then undefined)

removed minor AVX2 optimizations from 16-bit turbo decoder. had issues for small block lengths in UE.

bugfixing for UL. Remaining problems: CCE allocations in subframe 5 lead to occasional illegal DCI allocations (affects UL DCI which is missed by UE). waveform compliance with CQI in ULSCH.

probably not be here.

added a new check for illegal file permissions to mbmssim.c, to avoid a segfault if permissions are invalid.