Potential NPE when processing instance model

[lwrage]

Summary
Methods org.osate.aadl2.instance.impl.InstanceObjectImpl.getInstanceObjectPath() and org.osate.aadl2.instance.impl.InstanceObjectImpl.getComponentInstancePath() may cause an NPE when called on an instance object that represents an instantiated data classifier. Such instance objects are not contained in the system instance.

Desktop (please complete the following information):

• OSATE Version: 2.14
• Operating System: all