[OPENENGSB-3619] added wrapped type casting for primitive types to EDBObject
[OPENENGSB-3619] removed unnecessary casting of Number types from EDBConverter
[OPENENGSB-3620] added more rigorous tests for primitive/wrapped type property conversion
Merge pull request #835 from thrau/OPENENGSB-3619-3620

[OPENENGSB-3619][OPENENGSB-3620]