Update git submodules

Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Add neutron_dnsmasq_force_metadata: True

    When deploying with ODL, the static route towards the metadata server is
    not set and the only alternative is getting the route pushed to the VM.
    To do so, we must add the "force_metadata: True" option to the dnsmasq:

    https://github.com/openstack/openstack-ansible-os_neutron/commit/a8c7e0b506a0c347a363dde3f60077aa0cab5641

    Change-Id: I43f9cabacf6cc8b82a22f1f0eedb36b9f1f0c31f
    Signed-off-by: Manuel Buil <mbuil@suse.com>