Fix test_volume_retype for active-active cluster

In case of active-active cluster deployment the host of the cinder
volume might be changed as it is uniq per node.

Related-Prod: PRODX-4874

Change-Id: Ifaf69e1b3563c9c6b729885a45723acacb2c82dd
(cherry picked from commit bd3a416a5e6afefdbd372c9157e9d60505e8cecf)
(cherry picked from commit 155a65a0a767ba1e73dcca098792d0b344571767)
2 files changed