void runCmdLine() throws IOException, InterruptedException, CliException {
      processCmd(this.cl);
      System.exit(0);
    }
Run the command-line args passed. Calls System.exit when done.
@throws IOException          in case of a network failure
@throws InterruptedException if the ZooKeeper client closes
@throws CliException         if the ZooKeeper exception happens in cli command
hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKMainServer.java