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According to upstream bug[0] a volume_type must be specified when creating a volume. Since tempest does not provide a volume_type this patch defines default_volume_type and sets it to lvm. [0]: https://bugs.launchpad.net/cinder/+bug/1610073 Change-Id: I801cc3d3b846e0be3b777a57753e01406d3273d2 Closes-Bug: #1611937