QMetaObjectBuilder creates broken QMetaObjects when a NOTIFY signal from a parent class is used

Create a class which has a property and is derived from another class. The property in the derived class uses a NOTIFY signal from the base class.

When this class is used as a prototype for the QMetaObjectBuilder the created QMetaObject is broken.

This bug is related to the following change: https://codereview.qt-project.org/#/c/188082/

I already started to fix the problem, but i'm getting into an area where i need to have a deeper understanding of the internal moc format, as the notifySignal needs to be added to the stringdata as well. I attached my WIP patch which already adds an autotest and also has the logic for identifying the signal.