Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "functest: Move verify back to opnfv-build-ubuntu"
  - functest: Move verify back to opnfv-build-ubuntu

    Recent rework changed the label for the verify jobs from
    "opnfv-build-ubuntu" to just "opnfv-build", trying to make it
    more OS-agnostic.
    Since verify jobs fail after the rework, try reverting the
    label change, hopefully it will fix the failure as well.

    Change-Id: I15d139d8dc2d2f940a1af2c1b5fb218d6be19f82
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>