Document objectMapper configuration

[tobilarscheid]

Explain that JsonInclude.Non_Null is only needed until the next release of swagger-jaxrs Once it is out, we can completly remove the line

[tobilarscheid]

As this functionality is finally merged in the swagger-jaxrs code, can we merge this example please?

[martinraie]

I assume this commit is not necessary anymore as https://github.com/swagger-api/swagger-core/issues/2106 has been reverted in https://github.com/swagger-api/swagger-core/pull/2349?

This row should still be removed: environment.getObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL); but replaced with this: environment.jersey().register(SwaggerSerializers.class);