[mdt-ocl.dev] OCL RC3 debugger changes

[Ed Willink <ed@xxxxxxxxxxxxx>]

Hi

While refreshing the debugger tutorial for Mars, I discovered a major 
howler in the debugging of IteratorExp and LetExp leading to a CCE and 
generally useless functionality.

The fix requires an API change to correctly create a nested debug 
evaluation environment, therefore RC3 has breaking API changes for 
org.eclipse.ocl.examples.debug. I am pretty sure that nobody, other than 
QVTd, is extending the debugger so I don't anticipate this causing 
anybody any problems.

If you are affected, please let me know and I will do my best to help 
you accommodate the changes. (Without LetExp and IteratorExp the 
debugger was essentially useless anyway.)  There is now a JUnit test!

The fixes can be previewed at 
https://hudson.eclipse.org/ocl/job/buckminster-ocl-branch-tests/lastSuccessfulBuild/artifact/MDT-OCL.downloads/mdt-ocl-Update-201506010741.zip

    Regards

        Ed Willink