Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: osa: Do not wipe cinder volumes"
  - xci: osa: Do not wipe cinder volumes

    When a volume is removed, cinder will fill the entire disk with 0s. This
    can slow down the volume removal process. Since we do not care what
    happens with the volume after it's being removed, we don't need to
    wipe it at all.

    Change-Id: I5ef1b01a18cdf2694252b450ca4f1c6a37090f71
Link: https://docs.openstack.org/cinder/latest/sample_config.html
    Signed-off-by: Markos Chandras <mchandras@suse.de>