Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Add the choice of interface for keystoneclient"
  - Add the choice of interface for keystoneclient

    1. When functest is running on external host not jumpserver,
       keystoneclient is used to retrieve or create projects/tenants
       and users, which would fail to establish connection to the admin
       endpoint.
    2. Keystoneclient will connect to the public endpoint by setting the
       env OS_INTERFACE to be public.
    3. Remove the admin endpoint check in check_os.sh.

    JIRA: FUNCTEST-801

    Change-Id: I324f5c8fdf61447319070a23f6b6bc6b1bbc1d48
    Signed-off-by: Linda Wang <wangwulin@huawei.com>