Update git submodules

Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Bugfix: wrong command in function 'check_https_enabled'

    JIRA: DOVETAIL-482

    1. In function check_https_enabled, it will use cmd
       "openstack catalog show identity |awk '/public/ {print $4}'"
       to check if it is https.

    2. However, this command will not work if it is https.

    3. Check https via OS_AUTH_URL rather than "openstack catalog show identity".

    Change-Id: If40ffa8e9b33c38123ff4b834198a8eaaedc1c9c
    Signed-off-by: xudan <xudan16@huawei.com>