Just the item.

This is an unfortunate, but necessary limitation to move forward.
We will re-enable this feature at a later time when switching
to a new parser architecture.

Matrix items can now be applied on both, Testcase items and Resource items.

Add also testcases

This unfortunately means also updating to an unrelased Qt 5.14

New Qt container come with an entrypoint script and a different
file layout. docker-compose makes our life easier.

- Do not use destinationDir any longer
- Let autotests find the executable automatically