private Version findLatest(Set<Version> versionSet) {
        List<Version> versionList = new ArrayList<>(versionSet);
        Collections.sort(versionList);
        return versionList.get(versionList.size() - 1);
    }
Allow build of other config models to fail if there is a validation override that allow skipping old
config models, or we're manually deploying
configserver/src/main/java/com/yahoo/vespa/config/server/modelfactory/ModelsBuilder.java