Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: playbooks: configure-opnfvhost: Copy all user_*.yml files"
  - xci: playbooks: configure-opnfvhost: Copy all user_*.yml files

    OpenStack-Ansible can make use of all the user_*.yml files so scenarios
    can make use of this facility to override the default ones we provide
    for every flavor. As such, lets copy all the user_*.yml files to the
    deployment host.

    Change-Id: I5ddce48677f66a3ff3ec127f0fc0163f9f45b200
    Signed-off-by: Markos Chandras <mchandras@suse.de>