Apex: More CSIT promotion fixes

Changes-Include:
 - Use 2 computes as required by ODL team
 - Get rid of checking JOB_NAME var for csit, and simply check if
   PROMOTE var is True
 - Pass PROMOTE all the way from top-down into deploy job
 - Use CSIT network settings file when deploying CSIT

Change-Id: I56d953516ce690749634b474e553baad3a762364
Signed-off-by: Tim Rozet <trozet@redhat.com>