qemu: remove hashtable entry leak
qemu: remove hashtable entry leak

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