The API was only catching the primary email change case, but we need to
catch email, emailpro and B_email.
We were also not accounting for any of the emails (on PUT or from the
DB) being undefined.
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>