Display AADLDoc for all elements

[lwrage]

Summary

When adding AADLDoc comments to a record field there is no documentation shown when hovering over a field name in an AADL model.

Environment

• OSATE Version: 2.6.0
• Operating System: all

[lwrage]

Hover text is provided via an IEObjectHoverProvider. The default implementation DefaultEObjectHoverProvider delegates to an IEObjectHoverDocumentationProvider that reads the AADLDoc (comment lines starting with --- immediately preceding the declaration).
DefaultEObjectHoverProvider checks in method if the referenced object can have hover text by checking if the object has a qualified name. We should just allow any NamedElement to have hover text.