Use req2params middleware for datavie search endpoint

lib/cartodb/controllers/layergroup.js

@@ -118,6 +118,7 @@ LayergroupController.prototype.register = function(app) {
         cors(),
         userMiddleware,
         allowQueryParams(allowedDataviewQueryParams),
+        this.req2paramsMiddleware,
         this.dataviewSearch.bind(this)
     );
 
@@ -126,11 +127,11 @@ LayergroupController.prototype.register = function(app) {
         cors(),
         userMiddleware,
         allowQueryParams(allowedDataviewQueryParams),
+        this.req2paramsMiddleware,
         this.dataviewSearch.bind(this)
     );
 
-    app.get(app.base_url_mapconfig +
-        '/:token/analysis/node/:nodeId',
+    app.get(app.base_url_mapconfig + '/:token/analysis/node/:nodeId',
         cors(),
         userMiddleware,
         this.req2paramsMiddleware,
@@ -194,12 +195,7 @@ LayergroupController.prototype.dataviewSearch = function(req, res, next) {
     var self = this;
 
     step(
-        function setupParams() {
-            self.req2params(req, res, this);
-        },
-        function searchDataview(err) {
-            assert.ifError(err);
-
+        function searchDataview() {
             var mapConfigProvider = new MapStoreMapConfigProvider(
                 self.mapStore, req.context.user, self.userLimitsApi, req.params
             );