payment 7.x-1.11

Remember to check the change records and run the update script (update.php) when upgrading from a lower version.

Changes since the previous version:

• #2261619: payment_form_process_method_submit doesn't work
• #2326713: window.opener does not have to be defined
• #2323627: payment_form_embedded() validate callback cannot be invoked
• #2174395: New PaymentMethodUnavailable method created when clearing cache using Features and hook_default_payment_method().
• #2174395: New PaymentMethodUnavailable method created when clearing cache using Features and hook_default_payment_method().