refactoring

idem pull request rabbitmq

et pour le hiera :

---

sensu::repo: 'http://192.168.184.1/packages/sensu/el/$releasever/$basearch/'

sensu::mqsrv:          'el6a'
sensu::mqsrv_user:     'sensu'
sensu::mqsrv_password: 'password'

sensu::server::dashboard_user:     'admin'
sensu::server::dashboard_password: 'password'