Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "dovetail tool: check push_to_db success or fail"
  - dovetail tool: check push_to_db success or fail

    JIRA: DOVETAIL-380

    If Functest fails to push results to db, there is just an error log in functest.log
    Dovetail needs to know the failure.
    Dovetail will get the results from db with keys, build_tag and testcase.
    If it can get the results data, it means push_to_db success.

    Fix the duration time wrong.

    Change-Id: If03bdf0ceb2f1a9d422381cdf06e1fd207358bd5
    Signed-off-by: xudan <xudan16@huawei.com>