@Override
    public ObjectMapper locateMapper(Class<?> type, MediaType mediaType) {
        return OM;
    }
Use our own configuration of ObjectMapper as the default one can't serialise Java 8 datastructures
(e.g. OffsetDateTime).

@author Marc Savy {@literal <marc@blackparrotlabs.io>}
manager/api/rest-impl/src/main/java/io/apiman/manager/api/providers/JacksonObjectMapperProvider.java