Make @JsonAlias be respected by polymorphic deduction for deserialization

[JooHyukKim]

fixes #4327

[cowtowncoder]

@JooHyukKim I was hoping BeanPropertyDefinition was already exposing accessor but it does not -- only BeanProperty (constructed from BeanPropertyDefinition, used on deserialization side) has it.

But I think it'd make sense to add something like Collection<PropertyName> getAliases() in BeanPropertyDefinition, to encapsulate handling there. If so, that might be something that could simplify/unify alias handling from other places.

[JooHyukKim]

But I think it'd make sense to add something like Collection<PropertyName> getAliases() in BeanPropertyDefinition

Agreed on this. I was actuall looking for such method from BeanPropertyDefinition while working on it.

[JooHyukKim]

Because idea of Implementing getAliases() seemd open-ended, so I so went ahead and filed #4336

[cowtowncoder]

Because idea of Implementing getAliases() seemd open-ended, so I so went ahead and filed #4336

Good thinking! I think that made sense, merged.

[cowtowncoder]

Looks good, just needs to change call to findAliases().

I'll call it a night; will get this merged tomorrow. Thanks again!

[cowtowncoder]

Merged, thank you @JooHyukKim !