change cmd to volatile ,maybe changed and can't see
Merge remote-tracking branch 'origin/master'
Mysql 连接同步优化，以及修改Timeout 超时的问题
Insert测试代码缺陷修复
Merge pull request #56 from opencloudb/master

Mysql 连接同步优化，以及修改Timeout
Merge remote-tracking branch 'mycat/master'

Conflicts:
	src/main/java/org/opencloudb/mysql/nio/MySQLConnection.java
	src/test/java/org/opencloudb/performance/TravelRecordInsertJob.java