Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: osa: switch back from GitHub to OpenStack OSA repos

    Switching to github.com for the gitclones did not make much of a
    difference since we are still seeing randomg SSL failures during git
    clones. So we can switch back to git://git.openstack.org hoping that
    the git protocol will be more efficient than https. Moreover some
    projects are moving away from github mirroring and this breaks our
    tests.

    Change-Id: I8188ec7cbfbf16eeb4634bd9a44b12a104ce1059
    Signed-off-by: Markos Chandras <mchandras@suse.de>