rename statsd type to mtype
rename statsd type to mtype

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