Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Increase Functest jjob timeouts"
  - Increase Functest jjob timeouts

    Functest has multiplied the testcases and integrates several ones
    which are growing (e.g. snaps).

    4 hours is reached if snaps or one vnf testcase fails (20 minutes).

    https://build.opnfv.org/ci/view/functest/job/functest-compass-baremetal-daily-master/1695/console

    Change-Id: I5e8b744d35b5253f6e7ac1310286ae374de1943b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>