Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [MaaS] destructive storage test fio on failure

    Perform fio storage destructive test operation (usually takes just a
    few minutes) to completely destroy any previous storage metadata that
    might cause issues with cleanup in cloud-init/curtin during deploy.

    Only resort to fio when a node fails to deploy, which allows us to
    reuse the `maas.machines.mark_broken_state` state.

    JIRA: FUEL-365

    Change-Id: Ief327e6b4fefa83a8a3c131acfdf9f5fd605689d
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>