AdaBoost二分类
======================

DAG系统模板一直在修改，因此前端算子参数未确定   

算法入口及参数
-------------------

+---------+---------------------------------------------------------------+--------------+
| 名称    | 示例                                                          | 备注         |
+---------+---------------------------------------------------------------+--------------+
| args[0] | hdfs://namenode:9000/ispatial/pmml/pmml2019062605545200088511 | 模型输出地址 |
+---------+---------------------------------------------------------------+--------------+
| args[1] | tmptb2019062511473300088201                                   | 输入表名     |
+---------+---------------------------------------------------------------+--------------+
| args[2] | 10                                                            | 最大迭代次数 |
+---------+---------------------------------------------------------------+--------------+
| args[3] | 3                                                             | 文件分区数   |
+---------+---------------------------------------------------------------+--------------+
| args[4] | 10                                                            | 特征分区数   |
+---------+---------------------------------------------------------------+--------------+
| args[5] | 2                                                             | 目标类分区数 |
+---------+---------------------------------------------------------------+--------------+
| args[6] | "name1,name2,name3"                                           | 特征列名称   |
+---------+---------------------------------------------------------------+--------------+
| args[7] | "label"                                                       | 目标列名称   |
+---------+---------------------------------------------------------------+--------------+