Change openid and username in Haka-login.

Use eppn (Haka: eppn) instead of email (Haka: mail) for openid. Create username from fullname (Haka: cn) instead of email.

NOTE: you must also update ckan/ckan/config/who.ini and /etc/shibboleth/attribute-map.xml from https://github.com/pkoskinen/kata-packaging-main