fix bug: Delete "vm that has snapshot" spend more time We are now using ceph as nova backend in version juno/stable. In the following scene, deleting instance will take more time than icehouse. (211027)

fix bug: Delete "vm that has snapshot" spend more time We are now using ceph as nova backend in version juno/stable. In the following scene, deleting instance will take more time than icehouse. (211027) · Gerrit Code Review