OpenStack heat stack delete failed due to volume still in use

Issue

Stack delete failed due to volume in use

See: Stack ABCe0a61ac_RESOURCES delete failed due to volume c7ff7aee-629e-49a5-a49f-c36802b7888e in use

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, "stack_status_reason": "Resource DELETE failed: Error: Volume in use", "stack_name": "ABCe0a61ac_RESOURCES", "creation_time": "2015-05-11T08:24:43Z", "updated_time": null, "stack_owner": "cb2", "stack_status": "DELETE_FAILED", "id
": "ebb5aafd-35ef-480a-9456-1d4c2ed4a58b"}