Update git submodules

Update git submodules

* Update docs/submodules/armband from branch 'master'
  - u/fuel: Bump & rebase for Pike upgrade

    - virtual deploys will use only UCA repos, without Armband/MCP;
    - base image pre-build is now upstream, drop our patches;
    - drop p/fuel libvirtd group workaround, now upstream in Fuel@OPNFV;
    - drop p/reclass glusterfs PPA arch extension, obsolete;
    - refactor armband repos in system.repo.mcp into:
      * armband (new, contains kernel, libvirt etc.);
      * armband_openstack (move into system.repo.mcp.openstack);
      * armband_mk_openstack (move intro system.repo.mcp.openstack);
      * armband_mcp_extra (move into system.repo.mcp.extra);
    - drop 'nova: Update console defaults for armv7, aarch64';
    - minor rebase of nova libvirt driver patches in our roll-up;

    JIRA: ARMBAND-335

    Change-Id: Ic5b7736cdd1d1ad5ff25728925198e8ea3e6b5b1
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>