private static void register(Map<String, ProvidedModel> models, String modelId, String uri, Set<String> tags) {
        models.put(modelId, new ProvidedModel(modelId, URI.create(uri), tags));
    }
Replaces model id references in configs by their url.

@author lesters
@author bratseth
config-model/src/main/java/com/yahoo/vespa/model/container/xml/ModelIdResolver.java