Update openjdk compatible test version to 7
Update openjdk compatible test version to 7

lollipopjin/incubator-rocketmq,dongeforever/incubator-rocketmq,lindzh/incubator-rocketmq,lollipopjin/incubator-rocketmq,diwayou/apache-rocketmq-all,DR-YangLong/RocketMQ,Todd-start/RocketMQ,Coneboy-k/incubator-rocketmq,penghuazhou/incubator-rocketmq,vesense/incubator-rocketmq,shroman/incubator-rocketmq,Todd-start/RocketMQ,diwayou/apache-rocketmq-all,DR-YangLong/RocketMQ,vesense/incubator-rocketmq,penghuazhou/incubator-rocketmq,vesense/incubator-rocketmq,Coneboy-k/incubator-rocketmq,shroman/incubator-rocketmq,Vansee/RocketMQ,wildwind/incubator-rocketmq,lindzh/incubator-rocketmq,penghuazhou/incubator-rocketmq,vsair/incubator-rocketmq,shroman/incubator-rocketmq,wildwind/incubator-rocketmq,vsair/incubator-rocketmq,lindzh/incubator-rocketmq,dongeforever/incubator-rocketmq,vsair/incubator-rocketmq