Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: file: install-ansible.sh: Update script from latest Bifrost"
  - xci: file: install-ansible.sh: Update script from latest Bifrost

    Update our own copy of the Ansible installation script to take some
    Bifrost fixes into consideration. We also upgrade the pip and setuptools
    to the latest available version if possible.

    Change-Id: I5e51099b2698f0b03922d1364e83bc91cfadc00c
    Signed-off-by: Markos Chandras <mchandras@suse.de>