Explain why we re-raise ClientException in the swift storage engine

storage/swift.py

@@ -106,6 +106,8 @@ class SwiftStorage(BaseStorage):
                                         chunk_size=chunk, content_type=content_type,
                                         headers=headers)
     except ClientException:
+      # We re-raise client exception here so that validation of config during setup can see
+      # the client exception messages.
       raise
     except Exception:
       logger.exception('Could not put object: %s', path)