MEDIUM: Fixed issues with Generics by switching to newer version of
javassist.
See also issue https://issues.jboss.org/browse/JASSIST-184 and
https://issues.jboss.org/browse/JASSIST-101
Merge branch '1.7_diagram_federation' of ssh://github.com/agilebirds/openflexo into 1.7_diagram_federation