private void writeMetadata(ApplicationMetaData metaData) {
            curator.set(getZooKeeperAppPath(META_ZK_PATH), metaData.asJsonBytes());
        }
Feeds application metadata to zookeeper. Used by config model to create config
for application metadata

@param metaData The application metadata.
configserver/src/main/java/com/yahoo/vespa/config/server/deploy/ZooKeeperDeployer.java