virsh: Add options in virsh.restore() fucntion.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
libvirt-tests: Use tmp_file for virsh restore

Reported-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>