
The new configuration storwize_preferred_host_site was introduced in volume type for hyperswap feature on Queens release. Actually, the host_site is related to host rather than volume. This patch removes the parameter storwzie_preferred_host_site from volume type configuration and updates it from StrOpt to DictOpt in cinder back-end configuration. Closes-Bug: 1742866 Change-Id: Ie1df4cc45c2d1f72f33beea7ddc5bb3797a34728
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