Merge pull request MyCATApache#2392 from WhaleCloud-platform/MyCATApa…

…che#2390

MyCATApache#2390 load data local过程中出现错误，应用直接报Lost connection to MySQL server dur…

Merge pull request MyCATApache#1660 from magicdoom/1.6

 解决编译和单元测试错误

Merge pull request MyCATApache#1385 from magicdoom/1.6

binlog value null and change to 1.6.5 beta

Merge pull request MyCATApache#1176 from magicdoom/1.6

fix zk npe 优化zk写入

Merge pull request MyCATApache#1141 from qiankunshe/1.6

提交处理 sql 引用的问题，并新增了几个测试方法

修改版本号为1.5-beta

增加 用于检测连接同步的测试类