Fix forIn rather than each for iterating on object

lib/utils.js

@@ -447,7 +447,7 @@ var Utils = module.exports = {
     if (omitNull) {
     if (omitNull) {
       var _hash = {};
       var _hash = {};
 
 
-      Utils._.each(hash, function(val, key) {
+      Utils._.forIn(hash, function(val, key) {
         if (options.allowNull.indexOf(key) > -1 || key.match(/Id$/) || ((val !== null) && (val !== undefined))) {
         if (options.allowNull.indexOf(key) > -1 || key.match(/Id$/) || ((val !== null) && (val !== undefined))) {
           _hash[key] = val;
           _hash[key] = val;
         }
         }