ensure dont overwrite data in copy from req.params to res.locals

lib/cartodb/middleware/context/locals.js

@@ -1,7 +1,7 @@
 const _ = require('underscore');
 
 module.exports = function localsMiddleware(req, res, next) {
-    _.extend(res.locals, req.params);
+    _.defaults(res.locals, req.params);
     
     next();
 };

lib/cartodb/middleware/user.js

@@ -4,11 +4,5 @@ var cdbRequest = new CdbRequest();
 module.exports = function userMiddleware(req, res, next) {
     res.locals.user = cdbRequest.userByReq(req);
 
-    // avoid a req.params.user equals to undefined
-    // overwrites res.locals.user
-    if(!req.params.user) {
-        delete req.params.user;
-    }
-
     next();
 };