Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Remove a sub test case under dovetail.tempest.tc004

    - Fixed vping, ha, sdnvpn test case names to match test specs
    - Removed aliases from VIM operations and matched test case
    name changes in patch https://gerrit.opnfv.org/gerrit/#/c/47691/4
    - CVP to OVP name change

    - A test case was removed from tempest tc004 because of the Tempest
    version from 15 to 14. A reference to it was still in this doc.

    Change-Id: If2e07e15b48ae6bca5ac0e262aead784cd67cd0f
    Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>