Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "Bugfix: All HA testcases are SSH timeout in CI jobs"
  - Bugfix: All HA testcases are SSH timeout in CI jobs

    JIRA: DOVETAIL-405

    1. All HA test cases running in CI are SSH timeout.
    2. The reason is that HA test cases need a file pod.yaml providing the info of
       each node of Openstack.
    3. This pod.yaml should be put in $DOVETAIL_HOME/dovetail/userconfig by users.
    4. Dovetail's CI jobs should also do some adaptions. JIRA: DOVETAIL-407
    5. modify file .gitignore to ignore directories results/ and userconfig/.

    Change-Id: I5c681445ec83c9d67a0151370f5b56840ffe444c
    Signed-off-by: xudan <xudan16@huawei.com>