Update git submodules

* Update docs/submodules/releng from branch 'master'
  - 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>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f418aa3..a12bbcc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f418aa3b4b4d1659a9d0fbd36cb604f7b64e559f
+Subproject commit a12bbcc26a75b51e185fd3e5b87c4834fbbffe0f