Map BAPI tables to non-generic Collections

[cerker]

Currently, Hibersap detects the type of the Collection by analyzing its generic type. It shall also be possible to map BAPI tables to Collections without generic type. In this case, the type has to be defined per annotation or annotation attribute, like JPA's targetEntity attribute in @onetomany etc.

May be useful also for other parameters so we can map to an interface, abstract class.