Support type parameter annotations

[XakepSDK]

I request ability to use some/all annotations on type parameters.
Type parameter annotations are available since java 8
E.g.
Map<String, @JsonIgnoreProperties("ignore-me") Worker> map
This is very useful. I could drop some wrappers with this feature.

[cowtowncoder]

Ok, if someone wants to tackle this, great!

But it would require a major rewrite of the whole annotation handling system so it's not a small change.