ElasticSearchOutput was swallowing bulk index operation errors, and
use of deprecated httputil.ClientConn was causing problems in certain
cases when ElasticSearch was restarted on the other side of the
connection.
Remove debug droppings.
Merge pull request #1013 from mozilla-services/es-restart-connection-bug

Es restart connection bug
Merge branch 'versions/0.6' into statsd-input-trim-whitespace

Conflicts:
	CHANGES.txt