public static void createAndFailSilent(ZKWatcher zkw, String znode) throws KeeperException {
    createAndFailSilent(zkw, znode, new byte[0]);
  }
Creates the specified node, iff the node does not exist. Does not set a watch and fails
silently if the node already exists. The node created is persistent and open access.
@param zkw   zk reference
@param znode path of node
@throws KeeperException if unexpected zookeeper exception
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java