this is not handled correctly as of now, let's crash

- re-use ta_timer
- when ta_timer is running:
  - no TA sent to UE
  - no TA from UE (for UE to have time to apply previous TA command)
- decrease ta_timer every TTI
- be careful to use correct value of ta_update (31 means no TA)

Maybe not correct, to be checked.

handling of PDCCH order. stoping UE-specific scheduler during RA procedure. checking for DCI format (resource allocation) to not overwrite resource_block_coding for format 1A DCIs.

put 50 PRB back in default enb configuration. added handling of UE release in L1/L2. detection of stale ULSCH configuration

removal of LOG_I put for debugging.

- don't use o_flip anymore in ulsch_decoding
- remove dl_cqi from eNB_UE_STATS
- put dl_cqi[NFAPI_CC_MAX] in UE_sched_ctrl
- adapt code for this dl_cqi change (from eNB_UE_STATS to UE_sched_ctrl)
- extract_pusch_csi has been fixed for CQI_ReportModeAperiodic_rm30,
  the others need to be done. Program will exit if one uses them.
  Not sure if setting sched_ctl->dl_cqi[CC_idP]  has to be done in this
  function...

fixed various bugs in NFAPI interface and DCI CCE allocations (eNB_scheduler_primitives.c:allocate_CCEs())

fixed coherency issue across slots for PUCCH 1A/B detection (energy detection component). Introduced a variable scaling for channel matched filter in PUCCH1A/B detector. Current version goes as far on simulator as RU-RAU-split prior to merge with develop

not finished, UE may not work, many things bad/to fix properly