message: Add additional output for "pkcluster info table"
  Add total_commands_processed and total_write_commands_processe
  for every table info.
diff: @@ -79,6 +79,8 @@ void PkClusterInfoCmd::ClusterInfoTableAll(std::string* info) {
  tmp_stream << "table_id: " << table_id << "\r\n";
  tmp_stream << " partition_num: " << table_struct.partition_num << "\r\n";
  QpsStatistic qps = table_stat[table_struct.table_name];
  + tmp_stream << " total_commands_processed:" << qps.querynum.load() << "\r\n";
  + tmp_stream << " total_write_commands_processed:" << qps.write_querynum.load() << "\r\n";
  tmp_stream << " qps: " << qps.last_sec_querynum << "\r\n";
  tmp_stream << " write_qps: " << qps.last_sec_write_querynum << "\r\n";
  tmp_stream << " read_qps: " << qps.last_sec_querynum - qps.last_sec_write_querynum << "\r\n";
  