Update git submodules

Update git submodules

* Update docs/submodules/armband from branch 'master'
  - p/fuel: reclass: opendaylight: Use UCA repos

    Current opendaylight pillar enforces a full apt repository cleanup,
    removing Ubuntu Cloud Archive (UCA) repos in favor of adding
    pre-hardcoded Ubuntu archive repos.

    Mitigate this by ommiting "system.linux.system.repo.ubuntu" from the
    opendaylight pillar, leaving the default UCA repos in place.

    Change-Id: Ia2511e8028c8e28ec505c9a35b5dd2e76f4bcd0a
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>