Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Put ericsson-build4 under ansible control"
  - Put ericsson-build4 under ansible control

    Docker needs an updgrate as storperf jobs are failing
    Merging this should fix this with the daily ansible job
    since its never been run, might want to trigger it manually
    and watch it.

    JIRA: INFRA-231

    Change-Id: I7720ce707d2d1fb7cc794948992871ae98acedc7
    Signed-off-by: agardner <agardner@linuxfoundation.org>