Bug 7068 - autobarcode not working when duplicating patrons

Bug 7068 - autobarcode not working when duplicating patrons

Fixed by blanking cardnumber in the code and showing it in the template,
instead of just not showing it in the template

Autobarcode now correctly fills in on a duplicated patron.

Signed-off-by: Melia Meggs <melia@test.bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>