Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - [baremetal] Fix: wrong nic name idf index

    This was only affecting pod deployments with
    different board models, under the current limited
    support:
    - 3 KVMs will be same model and have the same NIC names
    - 2 Compute nodes will be the same model and have same NIC names

    For the computes nodes, br-mesh NIC name was wrong due
    to incorrect idf mapping

    Change-Id: I9685b35cb23b03be9fc0e6fe16c0712a9ad70e19
    Signed-off-by: Guillermo Herrero <guillermo.herrero@enea.com>
    (cherry picked from commit 378b4a72c27c941d5e37216edb23f224fbb58e26)