Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "jjb: xci: Create XCI test script"
  - jjb: xci: Create XCI test script

    We need to respect the environment during testing so we need to create
    a proper test script which exports all the variables that matter for our
    tests. We do that before we create the VM so the VM creation script can
    rsync the test for us. We also properly escape the DISTRO variable when
    destroying the VM.

    Change-Id: Ic3fff40868155af31762e458c1faee24354c0712
    Signed-off-by: Markos Chandras <mchandras@suse.de>