Use req2params middleware for analisys node status endpoint

lib/cartodb/controllers/layergroup.js

@@ -15,6 +15,8 @@ var MapStoreMapConfigProvider = require('../models/mapconfig/provider/map-store-
 
 var QueryTables = require('cartodb-query-tables');
 
+const req2paramsMiddleware = require('../middleware/req2params-middleware');
+
 /**
  * @param {AuthApi} authApi
  * @param {PgConnection} pgConnection
@@ -43,6 +45,8 @@ function LayergroupController(authApi, pgConnection, mapStore, tileBackend, prev
 
     this.dataviewBackend = new DataviewBackend(analysisBackend);
     this.analysisStatusBackend = new AnalysisStatusBackend();
+
+    this.req2paramsMiddleware = req2paramsMiddleware(authApi, pgConnection);
 }
 
 util.inherits(LayergroupController, BaseController);
@@ -126,19 +130,19 @@ LayergroupController.prototype.register = function(app) {
     );
 
     app.get(app.base_url_mapconfig +
-        '/:token/analysis/node/:nodeId', cors(), userMiddleware,
-        this.analysisNodeStatus.bind(this));
+        '/:token/analysis/node/:nodeId',
+        cors(),
+        userMiddleware,
+        this.req2paramsMiddleware,
+        this.analysisNodeStatus.bind(this)
+    );
 };
 
 LayergroupController.prototype.analysisNodeStatus = function(req, res, next) {
     var self = this;
 
     step(
-        function setupParams() {
-            self.req2params(req, res, this);
-        },
-        function retrieveNodeStatus(err) {
-            assert.ifError(err);
+        function retrieveNodeStatus() {
             self.analysisStatusBackend.getNodeStatus(req.params, this);
         },
         function finish(err, nodeStatus, stats) {