Description of problem:
Having a cdrom payload and trying to run the VM with sysprep,
the VM is running but only with the cdrom (we probably swallow an error)

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Create a new Windows VM with CDROM payload (via REST)
2. Run the VM with RunOnce, enabling sysprep
  
Actual results:
The VM is running but only with the cdrom

Expected results:
The VM should expose both the CDROM Payload and the sysprep floppy