Testconfig: Add winrt stage for Qtdeclarative and QtSensors

Added winrt stage for Qtdeclarative#dev and QtSensors#dev jobs.
Stages are forced to succeed. Once passing on CI, remove forcesuccess
properties.

Change-Id: I03646ce23011d7cac74ff8edab4ab0850fbb9ceb
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>