CDB-3256 Adds response and method references to fake request object

lib/cartodb/cartodb_windshaft.js

@@ -557,6 +557,8 @@ var CartodbWindshaft = function(serverOptions) {
           if ( err ) throw err;
           layergroup = instance;
           fakereq = { query: {}, params: {}, headers: _.clone(req.headers),
+            method: req.method,
+            res: res,
             profiler: req.profiler
           };
           ws.setDBParams(cdbuser, fakereq.params, this);