Stripping CVS keywords
#866130 by itsnotme, sun: Fixed default group role cannot be reset to default.
Preparing new release.
#613530 by Gábor Hojtsy, miro_dietiker, sun: Fixed not respecting custom group context.
#632304 by pwolanin, sun: Fixed group role form deletes default admin roles.
#632304 by sun: Fixed tests and added a new one for group administrators.
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