Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - [baremetal] Add two interfaces to the opnfv vm

    opnfv vm requires connectivity to two physical interfaces of the host.
    These interfaces are:
     1 - admin, where DHCP requests will arrive from blades to do PXE boot
     2 - mgmt, which connects to the mgmt of the blades to do the ansible
       configuration

    To achive this, it is required:
     1 - Two libvirt networks that connect to two different linux bridges.
       The important physical interfaces are connected to them. The
       interfaces name is fetched from the idf
     2 - Two templates representing the new libvirt networks
       (net-mgmt.xml.j2 and net-admin.xml.j2)
     3 - Two interfaces defined in vm.xml.j2

    Change-Id: I9037aa36802cfde44717b9394bab79b22d7dfaab
    Signed-off-by: Manuel Buil <mbuil@suse.com>