Update git submodules

Update git submodules

* Update docs/submodules/armband from branch 'master'
  - fuel, docs: fuel-menu: Align defaults with OPNFV

    Since Armband alters the bootstrap package list and/or kernel version,
    hanlded previously by fuel_bootstrap_cli.yaml, we need to refactor our
    patches a bit.

    NOTE: deploy-cache: We no longer include bootstrap package list in the
    bootstrap fingerprint; we only rely on the repo mirrors fingerprints,
    since bootstrap package list is mostly static across release cycles.

    Upstream-bug: https://bugs.launchpad.net/fuel/+bug/1679636

    JIRA: FUEL-266
    JIRA: ARMBAND-225

    Change-Id: I6c1b090df6eff69d60fa7ca779b3dde527e77879
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>