Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - [baremetal] Fix prx stale route via MaaS DHCP

    Although we add default routes via public network and disable
    DHCP client from setting new routes, until we reboot the prx* nodes
    we still have the stale route originally set at initial boot.

    Change-Id: Ib8e5fb67c7da00684e0ac21984fc4661d3820d83
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 7daf7f128714021711970557129a23a86cce2a72)