Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Add all tempest smoke test cases into debug test suite

    Add all tempest smoke test cases into debug test suite.
    Then these test cases can be run by Dovetail on CI.
    The results of CI will help to choose sub test cases from tempest smoke.

    Here use tempest_custom to run all tempest smoke test cases because it can
    support to run a custom defined sub test cases list.
    for Functest tempest_smoke_serial, it always runs whole tempest smoke
    test cases and can't be a subset.

    JIRA: DOVETAIL-595

    Change-Id: Id6358691d2bdef149f16775ce84dcfbf12f5e568
    Signed-off-by: xudan <xudan16@huawei.com>