Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Apex: Fix csit deployments for queens

    With changes to deploy scenario files for gambia, we still need the
    logic to pull in the right csit-env. That logic broke as it depended on
    DEPLOY_SCENARIO with the changes to scenario names. This patch fixes it
    to check openstack version (OS_VERSION) instead.

    Change-Id: Ie130efd0fc3cb7f09a3fa4e896ad461d24394777
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 66a6a17..fc7b83b 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 66a6a17f2e0889f02826a1ffd4d3f150d5c7bbab
+Subproject commit fc7b83bbf7d52f8a952c2d923eaeb912e40af0f1