修改系统监控数据生成规则，请忽略Agent修改
Merge branch 'master' of https://github.com/dianping/cat
添加Domain完全没有数据，显示为空的情况
Merge pull request #337 from jialinsun/master

修改系统监控数据生成规则，请忽略Agent修改
Merge branch 'master' of github.com:dianping/cat
modify the test