Add mqtt_statsd to firehose config

To get metrics on MQTT usage into graphite/grafana this commit adds
running mqtt_statsd on firehose

Change-Id: I90bb2c4fc7e409e9af24ca7cec7ad9d7926739e9
Depends-On: I28058bf6eac2354e3ceba0011464509ed6bdd869

modules/openstack_project/manifests/firehose.pp

@@ -26,6 +26,7 @@ class openstack_project::firehose (
   $mqtt_hostname = 'firehose.openstack.org',
   $mqtt_password,
   $mqtt_username = 'infra',
+  $statsd_host,
   $ca_file,
   $cert_file,
   $key_file,
@@ -99,4 +100,10 @@ class openstack_project::firehose (
     imap_use_ssl  => false,
     imap_delete_old => true,
   }
+
+  include mqtt_statsd
+  class {'mqtt_statsd::server':
+    mqtt_hostname   => $mqtt_hostname,
+    statsd_hostname => $statsd_host,
+  }
 }