Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Dovetail will not trigger apex test on huawei-pod4"
  - Dovetail will not trigger apex test on huawei-pod4

    1. Jobs to deploy Apex danube has been merged.
       This job will deploy Apex and then run Dovetail.
    2. So Dovetail don't need to run test on huawei-pod4,
       because it will be triggered by Apex deploy job.

    JIRA: DOVETAIL-503

    Change-Id: I49850a6c45e977ee3e5e8ad246b90a3dbd16884c
    Signed-off-by: xudan <xudan16@huawei.com>