Be able to tag requests with labels as easier way to provide business metrics

lib/api/map/anonymous-map-controller.js

@@ -3,6 +3,7 @@
 const windshaft = require('windshaft');
 const MapConfig = windshaft.model.MapConfig;
 const Datasource = windshaft.model.Datasource;
+const tag = require('../middlewares/tag');
 const cleanUpQueryParams = require('../middlewares/clean-up-query-params');
 const credentials = require('../middlewares/credentials');
 const dbConnSetup = require('../middlewares/db-conn-setup');
@@ -90,6 +91,7 @@ module.exports = class AnonymousMapController {
         };
 
         return [
+            tag({ tags: ['map', 'anonymous'] }),
             metrics({
                 enabled: this.config.pubSubMetrics.enabled,
                 metricsBackend: this.metricsBackend,