Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Create Stable Branch Jobs for joid"
  - Create Stable Branch Jobs for joid

    Change-Id: Ia810443a15d32e58262089de30e9b88655b5a7d4
    Signed-off-by: jenkins-ci <jenkins-opnfv-ci@opnfv.org>
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5df2b2b..7cdf9fa 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5df2b2bbac0d5ad63874ebbeb447ab140bdf03f2
+Subproject commit 7cdf9fa994e16561918912fcaad4cd3d56ab95fd