Interpreter wizard: Fix call of EmfCompare UI to support dynamic EMF 

Addresses bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=511567

The call to the EmfCompare UI is now based on the usage example at
https://www.eclipse.org/emf/compare/documentation/latest/developer/how-to-open-compare-dialog.html 

The previous error (ClassNotFoundException) doesn't show anymore, since
this code takes care of creating suitable ResourceSets for resolting the
meta-model references.

Change-Id: I09a1df6042091922f306483d68bd964769aaad36
1 file changed