Removed Deprecated Getter and Setters

- Removed Deprecated Getter Setters from all Model Classes
- All Camelcase getters and setters are removed. Please use first letter uppercase syntax
- E.g. instead of using get_notify_url(), use getNotifyUrl() instead

lib/PayPal/Api/Transaction.php

@@ -12,7 +12,7 @@ use PayPal\Rest\ApiContext;
  *
  * @package PayPal\Api
  *
- * @property self transactions
+ * @property Transaction transactions
  */
 class Transaction extends TransactionBase 
 {