Add test for cinder_img_volume_type image metadata

When a volume is created from an image with a cinder_img_volume_type
image property, and a volume_type is not specified in the volume-
create call, the resulting volume should be the specified volume_type,
not the default type.

Change-Id: If8edd24ba5183522ebe8202bbf6b62b41b3febe9
2 files changed