fix graphite prefix for carbon and statsd
fix graphite prefix for carbon and statsd

guardian/alerta,skob/alerta,0312birdzhang/alerta,mrkeng/alerta,skob/alerta,mrkeng/alerta,mrkeng/alerta,skob/alerta,guardian/alerta,skob/alerta,mrkeng/alerta,0312birdzhang/alerta,0312birdzhang/alerta,guardian/alerta,guardian/alerta