Subject: Testing seems broken!

Hi folks,

I've found a strange discrepancy between tests our surefire maven plugin
discovers compared to what eclipse discovers. Eclipse discovers more
tests, which is a rather *SEVERE* issue regarding our current surefire

I've opened an issue [1] to investigate this.

I already fixed all failing tests (as picked up by eclipse, but not with
surefire) within the 'core/metamodel' [2].

That lead to the discovery of 2 bugs [3][4] in 'master' and a
discrepancy between doc and code [5].

Cheers, Andi!