Revert "disable statsd"

This reverts commit bb05dcf221.
With paas's work on their scheduler, and our reduction in statsd dns
usage, we hope this is enough to re-enable statsd

app/config.py

@@ -493,9 +493,6 @@ class Live(Config):
 
     CRONITOR_ENABLED = True
 
-    # TODO: revert when we're confident statsd won't break things
-    STATSD_ENABLED = False
-
 
 class CloudFoundryConfig(Config):
     pass