Bug 14659: Allow patrons to enter card number and patron category on OPAC registratio...

Bug 14659: Allow patrons to enter card number and patron category on OPAC registration page

Test plan:
  1. Open OPAC self-registration page while logged out.
  2. Note that cardnumber and categorycode are not shown.
  3. Remove cardnumber and categorycode from
     PatronSelfRegistrationBorrowerUnwantedField.
  4. Enable autoMemberNum.
  5. Reload self-registration page, note that categorycode now shows.
  6. Disable autoMemberNum.
  7. Reload self-registration page, note that cardnumber now shows.
  8. Try saving a patron with an existing cardnumber; this should fail
     and explain why.
  9. Set CardnumberLength, and verify that those length restrictions are
     enforced.
 10. Verify that patron can be created with custom categorycode and
     cardnumber.

Signed-off-by: Michael Sauers <msauers@dospace.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com