SSDM-5142 : Project Authorization - experiment predicates and validators - make tests extend from the same system test class (to work exactly the same way) no matter which project they are in (openbis, screening etc.)

SVN: 38336

SSDM-5142 : Project Authorization - experiment predicates and validators - convert all new unit tests for project and experiment related predicates and validators to system tests (got much simpler and easier to maintain)

SVN: 38227

SVN: 38101

SVN: 38026