Bug 22597: Remove "more_subfields_xml" from GetPatronInfo response

Bug 22597: Remove "more_subfields_xml" from GetPatronInfo response

Test plan
1/ Set an item with some xml data in more_subfields_xml
2/ Issue this item to a borrower
3/ Query the webservice with GetPatronInfo methods and show_loans=1 params
4/ Check no <more_subfields_xml> tags are returned in the xml response from the webservice

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 73bc117b057bd5ea73c4075d586b644b0cafe00b)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>