Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "add 'lint-all-code' as wrapper of lint builders"
  - add 'lint-all-code' as wrapper of lint builders

    OPNFV has common coding style [1]. So, all repos shall be checked by
    one generic checker builder/job, eventually.

    This patch adds lint wrapper builder 'lint-all-code', and also
    refactors all exisiting lint and syntax check builders, following
    'lint-yaml-code' builder approach, which only checks modified files.
    This approach is nice as it won't require immediate fixes of violations
    in whole repo code right after the lint checker job is enabled.

    Note that lint jobs are still configured to run against some project
    repo, in order to seperate discussion; wheter we should apply this
    lint job to all OPNFV repo or not immediately.

    [1] https://wiki.opnfv.org/display/DEV/Contribution+Guidelines

    Change-Id: Ib4ab3ba5dc08845f3016b8be772f4ed119f11b2d
    Signed-off-by: Ryota MIBU <r-mibu@cq.jp.nec.com>