监控平台：service定义、通过界面同步命令、host通过弹出框选择service模板、为connection和host_group添加删除方法
Merge branch 'feature/mtb' of github.com:aronezhang/ironmine into feature/mtb

Conflicts:
	modules/170_monitor_base_mtb/app/models/mtb/service.rb
	modules/170_monitor_base_mtb/lib/mtb/monitor_manager.rb
Merge branch 'feature/mtb' of github.com:aronezhang/ironmine into feature/mtb

Conflicts:
	modules/170_monitor_base_mtb/app/models/mtb/service.rb
	modules/170_monitor_base_mtb/app/views/mtb/hosts/_new_form.html.erb