Statsd metrics don't appear to work

[jbuck]

@jrconlin and I were trying to get a grafana dashboard together that included the statsd metrics channelserver sends. Testing in stage revealed that no metrics were getting sent. I tested locally using nc -u -l 8529 to listen for statsd metrics but didn't see any. I changed the BufferedUdpMetricSink to a UdpMetricSink and I started to see some test metrics I set, but I don't see any of the regular metrics like conn.max.data or conn.max.msg