added staging tags via vanilla node-statsd

Created by: trevorah

DO NOT MERGE merge once https://github.com/sivy/node-statsd has tag support (beyond 0.0.7)

lib/stats.js

@@ -98,13 +98,14 @@ exports.create = function(options) {
   if (statsdEnabled) {
     var StatsD = require('node-statsd').StatsD;
     var statsdClient = new StatsD({ prefix: config.get('stats:statsd:prefix'), host: '127.0.0.1' });
+    var tags = config.get('STAGING') ? ['staging'] : [];
     statsdClient.socket.on('error', function(error) {
       return emergencyLog("Error in statsd socket: " + error, { exception: error });
     });
     statsHandlers.event.push(function(eventName) {
-      statsdClient.increment(eventName);
+      statsdClient.increment(eventName, null, null, tags);
     });
     statsHandlers.eventHF.push(function(eventName, count, frequency) {
@@ -112,18 +113,18 @@ exports.create = function(options) {
       if(!frequency) frequency = 0.1;
       /* Only send to the server one tenth of the time */
-      statsdClient.increment(eventName, count, frequency);
+      statsdClient.increment(eventName, count, frequency, tags);
     });
     statsHandlers.gaugeHF.push(function(gaugeName, value, frequency) {
       if(!frequency) frequency = 0.1;
       /* Only send to the server one tenth of the time */
-      statsdClient.gauge(gaugeName, value, frequency);
+      statsdClient.gauge(gaugeName, value, frequency, tags);
     });
     statsHandlers.responseTime.push(function(timerName, duration) {
-      statsdClient.timing(timerName, duration);
+      statsdClient.timing(timerName, duration, null, tags);
     });
   }