Bug 25875: Move check for module_bit and code to the JOIN

Bug 25875: Move check for module_bit and code to the JOIN

If we limit the JOIN to rows with the correct subpermission we won't
duplicate the returned patrons

To test:
 1 - Give a patron full acquisitions permissions
 2 - Also give them several subpermissions on other areas
 3 - Go to Acquisitions
 4 - Edit a fund
 5 - Add a user to the fund
 6 - Search for user above
 7 - They return multiple times in results
 8 - Apply patch
 9 - Restart all the things
10 - Repeat search
11 - Patron appears once

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>