Update unittest for Storwize pool-aware-cinder-scheduler
Update unittest for Storwize pool-aware-cinder-scheduler

Update unittest for Storwize pool-aware-cinder-scheduler
according to comments in
https://review.openstack.org/#/c/284614/ patch

Change-Id: I3fde5dd111690de14e1aacdc91e3bb8452c71bf4
Closes-Bug: 1552127

bswartz/cinder,Hybrid-Cloud/cinder,NetApp/cinder,openstack/cinder,mahak/cinder,cloudbase/cinder,j-griffith/cinder,NetApp/cinder,cloudbase/cinder,bswartz/cinder,j-griffith/cinder,phenoxim/cinder,Nexenta/cinder,Nexenta/cinder,Hybrid-Cloud/cinder,openstack/cinder,eharney/cinder,mahak/cinder,Datera/cinder,Datera/cinder,phenoxim/cinder,ge0rgi/cinder,eharney/cinder