In BA plugin, fail to open provided examples

[Etienne13]

Summary

Some of the Behavior Annex examples, provided with the plugin, cannot be open by the editor.

Expected behavior
Import, open and edit examples provided with the behavior annex plugin

Actual behavior
When opening some of these examples, inconsistent error messages appear (due to exceptions in the BA plugin) or the editor crashes.

Steps To Reproduce

1. Go to 'File'
2. Click on 'New --> Examples...'
3. Import all the Behavior Annex examples
4. See errors.

Desktop (please complete the following information):

• OSATE Version: 9.2.1
• Operating System: Linux

Additional context
Some of the errors are expected; but I don't think it is a good idea to provide erroneous examples (they are tests, not examples).
Some of the errors are bugs (regressions); either in the models (e.g. modes) or in the plugin (class cast exceptions).

A cleanup is necessary.

[jjhugues]

In addition, OSATE now has a different wizard for examples with additional features like showing a README. You might consider migrating and use this one instead

[Etienne13]

@jjhugues Can you point to an example so I can see how the new wizard works? Thanks!

[jjhugues]

File -> New -> Example

The rest is basic Eclipse plugin machinery, see https://github.com/osate/osate2/tree/master/examples
the core is in this xml file that points to examples, README, etc: https://github.com/osate/osate2/blob/master/examples/org.osate.examples/plugin.xml

[lwrage]

@Etienne13 Should this be moved to the next release (2.10.0)?

[Etienne13]

@lwrage the initial issue is fixed in branch 2583; I could not work on the examples documentation as suggested by Jerôme. I think the release you are preparing should include the existing fix. I will prepare the PR.