Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Connect ODL CI-CD to XCI"
  - Connect ODL CI-CD to XCI

    Provide the possibility to select what version of ODL to use, master included.
    Before executing xci-deploy.sh, the user can specify ODL's version by using the
    XCI_ANSIBLE_PARAMS variable:

    export XCI_ANSIBLE_PARAMS="-e ODL_VERSION=oxygen"

    Change-Id: I5b3879b0c197059b3aecace48760e983c65a586b
    Signed-off-by: Manuel Buil <mbuil@suse.com>