[names] Add JAXB provider to parse JSON to Java objects

[re1]

RESTEasy allows to parse JSON response bodies to Java Objects as documented here: https://docs.jboss.org/resteasy/docs/3.0.19.Final/userguide/html/Built_in_JAXB_providers.html#JAXB_+_JSON_provider. This might drastically reduce complexity when querying common name sources which respond with a specific JSON object.