Change paypal billing mode to 1 as required by webform_civicrm

Author: mattwire

Metadata/omnipay_PaypalRest.mgd.php

@@ -74,7 +74,7 @@
       'url_site_test_default' => 'http://unused.com',
       'url_recur_test_default' => 'http://unused.com',
       'url_api_test_default' => 'http://unused.com',
-      'billing_mode' => 4,
+      'billing_mode' => 1,
       'payment_type' => 1,
       'is_recur' => 1,
     ],