Change exception returned by AppleAppstoreGateway->checkExpire()

From `\Exception()` to `Omnipay\Common\Exception\InvalidRequestException`
which is used by all our gateways if `checkExpire()` is missing.

src/gateway/AppleAppstoreGateway.php

@@ -18,6 +18,7 @@
 use Nette\Application\LinkGenerator;
 use Nette\Http\Response;
 use Nette\Localization\ITranslator;
+use Omnipay\Common\Exception\InvalidRequestException;
 use ReceiptValidator\iTunes\PurchaseItem;
 use ReceiptValidator\iTunes\ResponseInterface;
 use Tracy\Debugger;
@@ -121,7 +122,7 @@ public function checkValid($originalTransactionID)
 
     public function checkExpire($recurrentPayments)
     {
-        throw new \Exception("AppleAppstore recurrent gateway doesn't support receipt expiration checking (it should never expire)");
+        throw new InvalidRequestException(self::GATEWAY_CODE . " gateway doesn't support token expiration checking (it should never expire)");
     }
 
     /**