fix lint

Author: Takashi Matsuo

monitoring/api/v3/cloud-client/snippets_test.py

@@ -16,8 +16,8 @@
 import re
 
 import backoff
-from google.api_core.exceptions import NotFound
 from google.api_core.exceptions import InternalServerError
+from google.api_core.exceptions import NotFound
 import pytest
 
 import snippets