Update git submodules

Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Add API(v2)  to update openrc

    JIRA: YARDSTICK-720

    API: /api/v2/yardstick/environments/openrcs/action
    METHOD: POST
    PARAMS:
    {
        'action': 'update_openrc',
            'args': {
                'openrc': {
                    "EXTERNAL_NETWORK": "ext-net",
                    "OS_AUTH_URL": "http://192.168.23.51:5000/v3",
                    "OS_IDENTITY_API_VERSION": "3",
                    "OS_IMAGE_API_VERSION": "2",
                    "OS_PASSWORD": "console",
                    "OS_PROJECT_DOMAIN_NAME": "default",
                    "OS_PROJECT_NAME": "admin",
                    "OS_TENANT_NAME": "admin",
                    "OS_USERNAME": "admin",
                    "OS_USER_DOMAIN_NAME": "default"
                },
                'environment_id': environment_id
            }
    }

    Change-Id: Ie9a1614190a01456fd0896f0bdfd05f9d0724fc6
    Signed-off-by: chenjiankun <chenjiankun1@huawei.com>