user cluster host err

[sixhj]

v0.3.1
use host: pulsar://10.57.98.208:6650,10.57.98.209:6650,10.57.98.210:6650,

happend

WARN[2510] [Failed to connect to broker.] error="dial tcp: address 192.168.33.3:6650,192.168.33.4:6650,192.168.33.5:6650: too many colons in address" remote_addr="pulsar://192.168.33.3:6650,192.168.33.4:6650,192.168.33.5:6650"