Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "Update user guide with the local DB operations"
  - Update user guide with the local DB operations

    If users want to store results or upload results to CVP web portal, they
    need to build local DB adn testapi service.
    Should add more introduction about the local DB and testapi in the user guide.

    JIRA: DOVETAIL-504

    Change-Id: I6493169b54104af8d7207d28fad93afedeae0b1b
    Signed-off-by: xudan <xudan16@huawei.com>