Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - [Baremetal] Modify interaction with bifrost roles

    Change some of the variables when calling opnfv-virtual.yml and
    baremetal=true:

    1 - We want to configure DHCP mapping between ip and mac when doing
    baremetal. The create-nodes role will generate a file with that
    mapping for us (baremetalstaticips)

    2 - Don't download the standard IPA image but build one with Fedora
    (only one that works in ericsson-pod2) when doing baremetal

    3 - Wait for the blade to complete its booting. Its ssh port becomes
    available with the IPA provision but that is not the final state.
    We need to wait until the required distro gets installed.
    When not doing baremetal, this is fine as the VMs boot very fast with
    the chosen distro but for baremetal it takes a while (ericsson-pod2
    servers take around 2 minutes to finish all BIOS booting). The playbook
    wait-for-baremetal.yml does this.

    Change-Id: I5536517209ff7f46ec034554d29566707778e397
    Signed-off-by: Manuel Buil <mbuil@suse.com>