Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "reclass: opendaylight: Use UCA default repos"
  - reclass: opendaylight: Use UCA default 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.

    Unlike UCA, main Ubuntu archive is split based on target arch, the
    main archive.ubuntu.com holding only x86 packages, while the other
    archs are hosted on ports.ubuntu.com.

    This leads to adding (only) x86-specific repositories to our AArch64
    UCA image.

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

    Change-Id: Ia7033bcb544d8752d5557bbabc92c92c5008b00c
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>