Bug 33349: Patron Attributes don't have identifying information in intranet

Bug 33349: Patron Attributes don't have identifying information in intranet

Patron Attributes have no identifying info in the template page, no stable ID to
style or effect with javascript, so when new patron attributes are added or
removed, their order may change, requiring extra work to make sure CSS and
javascript don't change the wrong patron attributes.

Test plan:

0) in intranet:
1) create patron attribute types with different codes:
   "TESTPA", "test2 PA", and "At%tr:X"
2) add those patron attributes to a patron, with some values
3) in a browser, go to a patron information page, and inspect
   the page source where the patron attributes are
4) note how the PA entries have no identifying information usable
   to css or javascript
5) apply patch
6) inspect the page source, note how the patron attributes have
   data-pa_code -value with the following values:
   "TESTPA", "test2PA", and "AttrX"
   (The attribute codes are sanitized to remove possibly problematic
   characters; those shouldn't be used in PA codes anyway)
7) Go to the page where you edit the patron's Additional attributes
   and identifiers, and repeat 6 for that page.

Signed-off-by: Pasi Kallinen <pasi.kallinen@koha-suomi.fi>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>