Revert "Move libvirt's qemu configuration dir to state fs"

This reverts commit 455e35e8fc845449cf8fd9b03afd804651612173.

It breaks with 
+ register-state-path --leave-symlink /etc/libvirt/qemu
/tmp/in_target.d/install.d/81-nova-kvm: line 10: register-state-path: command not found

Change-Id: I368d273089c8aa3b2647e79b821c124b11342fba
Merge "Revert "Move libvirt's qemu configuration dir to state fs""