Signature of method sso_failure() is changed to match the name name of
the context variable in template mellon/authentication_failed.html
(idp_message => reason).
- use extensions.any tuple to set the content of the Extensions node
- add tests for the presence of the eo:next_url node when
ADD_AUTHNREQUEST_NEXT_URL_EXTENSION is used
- add tests for next_url propagation through the RelayState value