Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: env-vars: Bump Ansible version to 2.3.2.0

    Now that bifrost uses virtual env for Ansible we can go ahead and
    bump the Ansible version to match the one from OSA so we can make use of
    the latest features. Furthremore, we stop passing ANSIBLE_VERBOSITY to
    the command line since it's an environment variable so Ansible already
    knows about it.

    Change-Id: I52d9a211fc0ced1f7830f6945b2943f35d38109b
    Signed-off-by: Markos Chandras <mchandras@suse.de>