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.

develop_integration_w20 into develop

Summary of changes:
- bug fixes
  * UE TDD fixes
  * PDCCH size computation (at phy level, still to be corrected at mac level)
  * DAI increment
  * fix run_enb_ue_virt_noS1 and run_enb_ue_virt_s1 to use Rel14 and
     have --xforms to work
  * compilation warning removals
  * better oaisim logging (print UE security keys,
    print version (git commit ID) at runtime, print working directory)

See merge request !190

Problems reported by Jorge Muñoz Castañer <jorgem@gti.uvigo.es>.

- use Rel14 binaries (those are produced by default)
- let -x option work to have graphical output
- fix VCD missing 'echo'

we can compute CCE_max_used_index out of the loop.

get_nCCE returns the number of available CCEs.

We can put the CCEs numbers [ 0 .. get_nCCE-1 ],
so we need to use <, not <=.