Add extract of the unit tests for generics and @TargetType support to an integration test
#312 prevent another possible ClassCastException in JDT in case we try to compute the erasure of the Null type
#344 only consider methods as property mapping methods if they have one source parameter, a non-void return type, and no @MappingTarget parameter
#345 fix detection of matching upper/lower bounds when using Eclipse JDT