xl: fix the 'upgrade' of Ide devices to Xen devices
xl: fix the 'upgrade' of Ide devices to Xen devices

Without this patch a VM.start will hang in 'wait_for_plug' because
the hotplug script writes the xvda paths (51712) while xenopsd
waits for the hda paths (768)

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@eu.citrix.com>

koushikcgit/xenopsd,thomassa/xenopsd,djs55/xenopsd,johnelse/xenopsd,johnelse/xenopsd,djs55/xenopsd,euanh/xenopsd,thomassa/xenopsd,johnelse/xenopsd,euanh/xenopsd,cheng--zhang/xenopsd,koushikcgit/xenopsd,cheng--zhang/xenopsd,thomassa/xenopsd,djs55/xenopsd,cheng--zhang/xenopsd,koushikcgit/xenopsd,euanh/xenopsd