Various exceptions in AADL Property Values view

[lwrage]

Summary

The view is not robust against models with syntax errors. This can occur while adding a property association to a model.

Steps to reproduce

I have model where I want to add a connection binding and type
Actual_Connection_Binding => (reference()) applies to ; in the properties section and edit.

I get NullPointerExceptions and various others related to parsing. All these should be ignored by the view.

Environment

• OSATE Version: 2.7.0
• Operating System: Linux