Bug 26973: [20.05.x] (bug 26119 follow-up) Restore patron's attributes during self...

Bug 26973: [20.05.x] (bug 26119 follow-up) Restore patron's attributes during self-registration

The assumption on bug 26119 was wrong. We actually store patron's
attributes during self-registration if
PatronSelfRegistrationVerifyByEmail is not enabled.

Test plan:
Test the different combinations of PatronSelfRegistration and PatronSelfRegistrationVerifyByEmail
Confirm that the patron's attributes appears during self-registration if
PatronSelfRegistrationVerifyByEmail is not set.
Confirm that the patron's attributes are stored when they are displayed
on the self-registration form
Confirm that you can edit the patron's attributes in any cases (if they
are marked as editable at the OPAC)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>