A volume-backed server will have no image attribute (or rather the image
property will be set to the empty string). As such, if you want to try
rebuild you will need to specify an image [*]. Enforce this.
[*] Before microversion 2.93, this must be the same image. However, we
don't touch on that here. This will be addressed later.
Change-Id: I6842dabd7acb4e3a78f894e55e616625757eb6a4
Story: 2010297
Task: 46290