Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: dynamic_inventory: Add new entry for deployment_host"
  - xci: dynamic_inventory: Add new entry for deployment_host

    The deployment host is normally the host which runs the various
    playbooks so we add a new entry in the inventory for localhost.

    Change-Id: I43baddf4fabd69579c1a02f55ece230a062c2d9b
    Signed-off-by: Markos Chandras <mchandras@suse.de>