
When we migrate, or retype with migration, a volume between availability zones we are setting the AZ of the migrated volume to the same AZ as the source volume, so we end up with a volume where the AZ does not match the backend's AZ. This patch fixes this issue for the generic migration code as well as the optimized driver migration. Change-Id: Ia1bf3ae0b7cd6d209354024848aef6029179d8e4 Closes-Bug: #1747949
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