don't print reinitialize warning where initialize with same params.

Author: aisk

lib/utils.js

@@ -90,8 +90,8 @@ module.exports = function(AV) {
    */
   AV.initialize = function(applicationId, applicationKey, masterKey) {
     if (masterKey) {
-      throw "AV.initialize() was passed a Master Key, which is only " +
-        "allowed from within Node.js.";
+      throw new Error("AV.initialize() was passed a Master Key, which is only " +
+        "allowed from within Node.js.");
     }
     AV._initialize(applicationId, applicationKey,masterKey);
   };
@@ -103,7 +103,10 @@ module.exports = function(AV) {
    * @param {String} applicationKey Your AV Application Key
    */
    AV._initialize = function(applicationId, applicationKey, masterKey) {
-    if (AV.applicationId !== undefined) {
+    if (AV.applicationId !== undefined &&
+        applicationId !== AV.applicationId  &&
+        applicationKey !== AV.applicationKey &&
+        masterKey !== AV.masterKey) {
       console.warn('AVOSCloud SDK is already initialized, please don\'t reinitialize it.');
     }
     AV.applicationId = applicationId;