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

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.

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 <=.

config 4 tested with Amarisoft

force j to -1, there is a compilation warning with the T tracer
(variable may be used uninitialized)

It seems that ciphering_algorithm is "unsigned int" in RRC Rel10
and "unsigned long" in RRC Rel14 (as processed by asn1c)

Let's force it to unsigned long in the log to avoid compilation-time
warnings.

those popped up thanks to previous commit

Seems like this commit got lost at some point.

Here was the message:
-----------------------------------------------------------------------------
Author: Cedric Roux <cedric.roux@eurecom.fr>
Date:   Tue Jan 10 14:21:02 2017 +0100

    add format indicator to get LOG_X warnings

    The LOG_X macros emit a lot of warnings when compiling with the T
    because they call the function logRecord (or logRecord_mt)
    which has not been "marked" as calling printf, so gcc won't
    emit typical printf warnings.

    With the T, they directly translate to sprintf, so those warnings
    pop up, much more verbose due to several macro expansions.

    Let's make them pop up all the time so it's easier to fix them.
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