Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "jjb: xci: xci-verify-jobs: Fix block on bifrost jobs"
  - jjb: xci: xci-verify-jobs: Fix block on bifrost jobs

    The bifrost jobs are normally named 'openstack-bifrost-...' so
    fix the regexp to look for proper bifrost job patterns.

    Change-Id: Ie1823e942a201485aa5fbad4bde27653823d849b
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 25bbd60..7054594 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 25bbd60c5032ebec1ba9507e4cc6c9e33fab5199
+Subproject commit 705459455f4671872a6cb44e257bb77fbfbd9863