Adjust openid_connect_spec to use `raise_error`
What does this MR do?
Don't use the throw_symbol matcher, that causes cleanup to be skipped in this spec.
We should eventually switch this spec to check the response of the request being specced: https://gitlab.com/gitlab-org/gitlab-ce/issues/40218
Why was this MR needed?
Otherwise some specs after the openid_connect_spec would fail.
What are the relevant issue numbers?
Edited by Bob Van Landuyt