@Override
    public boolean exists() {
        try {
            Path zkPath = getZKPath(path);
            return zkApp.exists(zkPath);
        } catch (RuntimeException e) {
            return false;
        }
    }
@author Ulf Lilleengen
@author Vegard Havdal
configserver/src/main/java/com/yahoo/vespa/config/server/zookeeper/ZKApplicationFile.java