Wait for the same hotplug path as upstream scripts, in all cases
Wait for the same hotplug path as upstream scripts, in all cases

Previously we used 'hotplug-status' for Vbds (good) but out own
custom path in '/xapi' for Vifs (bad). This makes xenopsd work with
both hotplug script versions.

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

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