It is a bug in function balanceCluster

[Gaojinchao]

In balanceCluster function , It should be "leastloaded=" + 
serversByLoad.firstKey ().getLoad().getNumberOfRegions())"


if(serversByLoad.lastKey().getLoad().getNumberOfRegions() <= max &&
       serversByLoad.firstKey().getLoad().getNumberOfRegions() >= min) {
      // Skipped because no server outside (min,max) range
      LOG.info("Skipping load balancing.  servers=" + numServers + " " +
          "regions=" + numRegions + " average=" + average + " " +
          "mostloaded=" + 
serversByLoad.lastKey().getLoad().getNumberOfRegions() +
          " leastloaded=" + 
serversByLoad.lastKey().getLoad().getNumberOfRegions());
      return null;
    }