Merge pull request #290 from leoliang/master

tag function add pool support & nginx test service finish
Merge pull request #291 from leoliang/master

finish tag function
Merge pull request #292 from leoliang/master

add findVirtualServerByPool method & refactor constants
Merge pull request #293 from leoliang/master

add @PostConstruct
Merge pull request #295 from leoliang/master

tag function bugfix
Merge branch 'slb' of https://github.com/dianping/phoenix