assign color formatter to handler
assign color formatter to handler

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