Make sure Anitya actually looks at the OpenID errors

This would prevent a redirect loop if the OpenID endpoint
would be broken or unreachable for any of the three
"hardcoded" providers.

Signed-off-by: Patrick Uiterwijk <puiterwijk@redhat.com>
You can try by setting the fedora openid url to httpd://whatever, as that will be an invalid OpenID endpoint. (Unless you have done some interesting things with your system of course)