Apply option outputs to image commands + renames
- Add image.add_member missing content-length header
- Rename image-[add|del]member commands to members-[add|delete]
- Remove update option from image-register
- In image-compute split properties to properties-list and properties-get
- Add optional output to methods
* image: unregister, members add/delete/set
* image compute: delete, properties delete
- Transliterate methods to list-get-set-delete command groups:
* image: members, member
* image compute: properties
Refs :#3756 #3732