rm ws
remove IEventSummary body text test. currently the plone.app.contenttype guys are integrating an IRichText behavior, which is enabled by default and which is the reason, why this test breaks. once it's ready, we want to use p.a.c one and migrate old ct, but that's another story.
Refs #140 remove the IEventSummary behavior, since we now use p.a.contenttypes' IRichText behavior