Since the qemu process is running as qemu:qemu, it can't actually
look at the unix socket in /var/run/libvirt/qemu which is owned by
root and has permission 700.  Move the unix socket to
/var/lib/libvirt/qemu, which is already owned by qemu:qemu.

Thanks to Justin Clift for test this out for me.
Signed-off-by: NChris Lalancette <clalance@redhat.com>