@Override
    public List<NamedReader> getFiles(Path relativePath, String suffix, boolean recurse) {
        return zkApplication.getAllDataFromDirectory(Path.fromString(USERAPP_ZK_SUBPATH).append(relativePath), suffix, recurse);
    }
Returns readers for all the children of a node.
The node is looked up relative to the location of the active application package in zookeeper.
configserver/src/main/java/com/yahoo/vespa/config/server/zookeeper/ZKApplicationPackage.java