update ut

Author: saimonation

tests/ut/edge/test_mail.py

@@ -80,6 +80,7 @@ def _get_mail_server_config(self, port=25, username=None, password=None, use_tls
         if username is not None and password is not None:
             mail_param.useAuth = True
             mail_param.auth = Object()
+            mail_param.auth._classname = 'AuthSettings'
             mail_param.auth.username = username
             mail_param.auth.password = password