The checking of mediatype has also be done for input schema

[JoergAdler]

https://github.com/Mercateo/rest-schemagen/blob/8795d51f120451ca9ac00c3f607b184073a87bda/src/main/java/com/mercateo/common/rest/schemagen/link/LinkCreator.java#L220

[JoergAdler]

or we have to evaluate, if the logic should be moved to the schema generator