API for creating compute attributes will require additional tuning and block the CLI part. Therefore I split the task into read commands (this bug) and modifying commands (https://bugzilla.redhat.com/show_bug.cgi?id=1479765).
Thank you for your interest in Satellite 6. We have evaluated this request, and we do not expect this to be implemented in the product in the foreseeable future. We are therefore closing this out as WONTFIX. If you have any concerns about this, please feel free to contact Rich Jerrido or Bryan Kearney. Thank you.