fixing handling of ndi/first_tx in dci. commenting out corner case of missed ACK, this needs to be done better

develop_integration_w22 into develop

Summary of changes:
- UE:
  * TDD multiplexing
  * TDD autotest
  * bug fixes: power control management for Msg3, logging
- eNB:
  * CCE allocation fixes
  * S1U port in some configuration files set to 2152 (was 2153)
- support for RedHat enterprise linux 7 and derivatives (CentOS, ...)
  (work provided by RedHat)

See merge request !198

re-adding the possibility in dlsim to bypass the DCI/PDCCH generation. This is necessary for accuracy of the dlsim-tests, which are working again now.

Merge remote-tracking branch 'origin/feature-143-support-enterprise-linux-7' into develop_integration_w22

Signed-off-by: Frank A. Zdarsky <fzdarsky@redhat.com>

- rename UE_NO_LOG to DISABLE_LOG_X
  because the name is misleading. The full software
  is impacted, not only the UE part
- same for compilation option ---ue-no-log
  that becomes --disable-log
- keep LOG_X for the standard case, that is the
  case without DISABLE_LOG_X where printf has been
  put. Two reasons:
  * printf is not realtime friendly
  * keep behavior similar for other users who may
    be troubled by different logs that don't add
    any benefit to previous logs

The port to use should be 2152, not 2153.

Signed-off-by: Frank A. Zdarsky <fzdarsky@redhat.com>

We want the log in case of failure also for the case:
    if (nCCE + (1<<dci_alloc->L) > nCCE_max)

We have to not only ensure that the CCE is free but
also that it's below the number of availables CCEs
with respect to the current PDCCH size.