Type specialization from Object -> reference type does not work

[cowtowncoder]

(note: offshoot of #1256)

Usage like:

@JsonSerialize(as=Optional.class)
public Object reference

does not work as expected, most likely since type specialization does not convert from SimpleType into ReferenceType, and as a result BeanSerializer is used (at least by modules that expect to get proper type).

[cowtowncoder]

Hmmh. No; specialization from Object does actually work as expected; it is handled as a special case.