Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Merge "Add test area 'correct behavior after common virtual machine life cycles events'"
  - Add test area 'correct behavior after common virtual machine life cycles events'

    JIRA: DOVETAIL-473

    According to Dovetail addendum doc, add one test area about basic cloud
    capability 'correct behavior after common virtual machine life cycles events'.

    Add the test specification about this test area.

    Change-Id: I051b3c5b501ed833a613ea6a6601125c4fa80c3e
    Signed-off-by: xudan <xudan16@huawei.com>