TRUNK-5118 Remove use of databene benerator
* replaced use of MockPresentationMessage in PresentationMessageMapTest
and CachedMessageSourceTest by simply creating 2-3 PresentationMessages,
because thats all that was done before. No need for a generator library
* remove MockPresentationMessage as it is not used anymore
* remove dependency on databene benerator since its not used anymore
TRUNK-5118 Remove databene benerator from ConceptTest
replaced use of databene benerator from ConceptTest with constant names
of concepts since we only needed max of 2 different names per test
relying on this outdated or any fake data generator is overkill.
* also refactored the helper methods, removing the name 'mock' since we
are creating real instances of Concept/ConceptName and not mocks
