Testconfig: Adding QtEnginio submodule to CI

All stages forced to succeed for initial round.

Change-Id: Iead5d2faf1f409af8bfbf409d0308e87623dff4c
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>