qemu.py: Make it possible for snapshot disk data to be put elsewhere, otherwise hosted vms are hosed when the host /tmp fills up
qemu.py: Make it possible for snapshot disk data to be put elsewhere, otherwise hosted vms are hosed when the host /tmp fills up


git-svn-id: bf82309ee31681273af20a825c7064ea7c5af838@1085252 13f79535-47bb-0310-9956-ffa450edef68

apache/tashi,stroucki/tashi,stroucki/tashi,apache/tashi,stroucki/tashi,apache/tashi,apache/tashi