Migrate to new codepush service (#706)

src/script/management-sdk.ts

@@ -44,7 +44,7 @@ class AccountManager {
         OWNER: "Owner",
         COLLABORATOR: "Collaborator"
     };
-    public static SERVER_URL = "https://codepush-management.azurewebsites.net";
+    public static SERVER_URL = "https://codepush.appcenter.ms/v0.1/legacy";
     public static MOBILE_CENTER_SERVER_URL = "https://mobile.azure.com";
 
     private static API_VERSION: number = 2;