'Show default configuration for a group.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/identity/v3/index.html#show-default-configuration-for-a-group'

def show_default_group_config(self, group):

    url = ('domains/config/%s/default' % group)
    (resp, body) = self.get(url)
    self.expected_success(200, resp.status)
    body = json.loads(body)
    return rest_client.ResponseBody(resp, body)
