Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: osa: Simplify OpenStack host playbooks"
  - xci: osa: Simplify OpenStack host playbooks

    The configure-targethost playbook is configuring all the OSA hosts so
    we can simplify all that by introducing a new 'openstack' host group
    with the controller and the compute nodes and configure all of them
    in parallel.

    Change-Id: I21f8709e7649b041575dab45fc4e070aa01e0a6f
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 22ee7b4..e6ccdc7 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 22ee7b45c6dd18c49bfeca8e3a53c1a0cf5ee063
+Subproject commit e6ccdc7afc44e2c6191ed9bdbe5ceb48d14a4870