tree f8429a3b84fafc13c3a223ed5a0fc64cd9b90853
parent d3f98c67dc8b498e0a161c1cb96493479272db61
author zhufl <zhu.fanglei@zte.com.cn> 1471416330 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1471424360 +0800

Use cls in classmethod instead of self

_create_type_and_volume is a class method, so cls should
be used instead of self.

Change-Id: I2f05039ac5d556ab0457ffa7d598d3f943ccb598