Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "[Baremetal] Provide networking for Ubuntu nodes"
  - [Baremetal] Provide networking for Ubuntu nodes

    When deploying baremetal, the traffic should be segmented using the
    different interfaces instead of through vlans. All the config is done
    based on idf and pdf information.

    When doing non-baremetal, opnfv and nodes get the same config. When
    doing baremetal, opnfv and nodes get a different network config

    Change-Id: I23aa576bc782c7c69d511a5558827110c37b558a
    Signed-off-by: Manuel Buil <mbuil@suse.com>