Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[baremetal] Fix DPDK by running linux.system first" into stable/euphrates
  - [baremetal] Fix DPDK by running linux.system first

    DPDK scenario requires hugepages to be set up and enabled before
    configuring OVS ports, so apply `linux.system` on compute nodes
    and reboot them before attempting to run `linux.network` state.

    Change-Id: I2b685361b07727a4740a3676c5f219a6443d1cf2
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 64920b8bb1e95389146451598221f2c7eb97f5e3)