Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Publish Functest gate job

    It mainly conforms with the first jjbs published in functest.
    It only differs regarding the numbers of multijobs (limited to 1
    in releng) and the branch management.

    From the time being, rally-based testcases and vnfs are excluded
    to avoid falsy false.

    The next patch will update the gerrit trigger part.

    Change-Id: Ie1d2acbd9c4f2ad41ecd4cc43d0c13f855251349
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>