Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Functest verify jobs only for master branch"
  - Functest verify jobs only for master branch

    The verify job is running tox which is not in stable/danube
    branch. Therefore, the bugfixes in that branch fail.
    This enables verify jobs only to master branch.

    Change-Id: Iff2a7b5e2d6aaff489767e77ebfa9a16bb9326de
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1cb29bd..c7c0184 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1cb29bd339f434caffc4e0724f93d0bdefc2e281
+Subproject commit c7c018465d458a5bd98cd630620c052db784f615