Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Make sure the docker service is started

    We are installing the docker package but not checking if it is started

    The service name for the three distros is the same but I still added the
    variable in each distro variables file to keep best practices

    Change-Id: I0c73069ea7edc366e824cf39d14d24d1416fd6c3
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index b30146d..14f5c14 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit b30146d19dbbc9bfb48b37840d33f0d5baf96f83
+Subproject commit 14f5c1402e4268b5940a5258814cb198dc8f3bda