Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Modify interactions with installer VM to set up jenkins-ci for cbench test"
  - Modify interactions with installer VM to set up jenkins-ci for cbench test

    - was grabbing stackrc for SDN_CONTROLLER_IP, but it actually in overcloudrc
    - need to skip hostkeychecking for scp operations
    - change permissions and ownership of /tmp/.ssh/ files so jenkins-ci can
      take over as the user

    Change-Id: I2d8f3aadfd6eff35a288a4e49eabb035bb2560ef
    Signed-off-by: Jamo Luhrsen <jluhrsen@redhat.com>