Bug 18144: Restore pieces of C4/Auth to make Google OpenID Connect work

Bug 18144: Restore pieces of C4/Auth to make Google OpenID Connect work

By restoring some pieces of logic, with the name changed from $persona
to $emailaddress, the openid will work again for OPAC logins.

See https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=10988#c68
for an excellent test plan.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Did not test it, but trust in author and signoffer

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>