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Since now os-client-config has been superceded by openstacksdk[1]. So need to replace the os-client-config in zaqarclient to slove the issue that 'No module named os_client_config'. [1]:https://docs.openstack.org/os-client-config/latest/ Change-Id: I19bee5f276dcdd9a885fd99b6b656647e28ba139