修复CFNotNull Annotation取不到值bug和潜在的bug
#92 优化Name Server
#92 优化Name Server
Merge branch 'master' of gitlab.alibaba-inc.com:shijia.wxr/rocketmq
fixed #94 rebalance移除的队列，消费消息时，直接丢弃
fixed #93 rebalance完成后，需要把丢弃的队列offset上传到Broker
Merge branch 'master' of gitlab.alibaba-inc.com:shijia.wxr/rocketmq
Merge https://github.com/alibaba/RocketMQ