Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 7d030e0e8f90fb50e3ac25364991fa5ec9a62848
  - Switch CIRV verify/merge to use Global-JJB Tox job

    This replaces the current cirv verify job that just runs 'tox' from a
    bash shell, with the global-jjb tox job that first creates and
    activates a Python3 virtualenv. Additionally this runs tox post-merge.

    Change-Id: I4af90f08e34c417397a82391a7079fc556e6af85
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>