engine: set multi monitor only when compatible on import

Set true only for windows on 3.3 and higher,
Also fix tests

Change-Id: I8a5ae4a6367fd5e4184f42b514f9be6e42879c26
Bug-Url: https://bugzilla.redhat.com/1007784
Signed-off-by: Shahar Havivi <shavivi@redhat.com>