Adding AutoResize gui tests.

Adding tests for resizing the remote viewer window with autoresize on and off (spice vdagent on & virtio setup).

Signed-off-by: Vimal Patel <vipatel@redhat.com>
Adding two gui tests for autoresizing.

Test1: AutoResize on, changing rv_window, with virtio & spicevdagent setup, the resolution is adjusted to the changed window size.
Test2: AutoResize off, changing rv_window, with virtio & spicevdagent setup, the resolution does not change.

Signed-off-by: Vimal Patel <vipatel@redhat.com>
Adding wmctrl package to the setup for rv tests.

Adding wmctrl package to change a windows geometry, which is used for the autoresize tests.

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