import clean-ups and removed sysouts

- removed System.out.println(...) lines in HomogeneousDatatypes class
- removed unused imports in BooleanTestingSink
extended logging of DummySink

- added another else if branch to log the viewdef quads of
  MappingMeasureDatum measures
added HomogeneousDatatypes metric to the config
added DefinedClassesAndProperties metric + tests