Bug 33428: Parse search fields in buildPatronSearchQuery

Bug 33428: Parse search fields in buildPatronSearchQuery

This patch moves the parsing of standard search_field into the buildPatronQuery subroutine
and adds a check for 'standard' field before adding attributes to the search

To test:
1 - Add a new attribute type and make it searchable
2 - Add a value to a patron
3 - Search for this value using 'Standard' fields, confirm you get the patron
4 - Search for the value using 'Cardnumber' field, confirm you get the patron - BAD!
5 - Apply patch
6 - Repeat cardnumebr search, confirm patron not found - Yay!
7 - Search standard, confirm patron is found
8 - Add a new field to 'DefaultPatronSearchFields
9 - Confirm it appears in patron search dropdown
10 - Confirm a search of this field with the attribute value does not return the patron

Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>