Adding qemu monitor reporting of the listening ipv6 address

Signed-off-by: Vimal Patel <vipatel@redhat.com>
Added getting spice info from the qemu monitor

Adding getting spice info from the qemu monitor after the remote-viewer connection is established, and a check for data if requested by the test.

Signed-off-by: Vimal Patel <vipatel@redhat.com>