Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "docs: AArch64: Jumpserver min libvirt version" into stable/euphrates
  - docs: AArch64: Jumpserver min libvirt version

     - For the Jumpserver configuration
       Add bridge config
       Add Armband repository list for openstack ocata
       Add minimum libvirt version requirement
     - Fix various typo
     - Add option -S, -D in deploy script

    JIRA: ARMBAND-337

    Change-Id: Ic62819dbb28699cf8a2dba81b7d65a39e3f0b011
    Signed-off-by: ting wu <ting.wu@enea.com>
    (cherry picked from commit 8d6ea0ff12b6633b0edf6bbb0988360597efc57e)