Authorization header not passed to persistence API when doing a PUT for file attachments

[avernet]

However, the Authorization header is correctly sent, per the property below, when doing a PUT for the form data. This regressed because we are now not going through an XForms submissions for attachments, as we got rid of fr-create-update-attachment-submission, and it works for data because we are stilling going through the XForms submission fr-create-update-submission for the form data. As done by the XForms submission we should get those headers from the containing document, not from the request.

<property as="xs:string" name="oxf.http.forward-headers" value="Authorization"/>

+1 from customer