IdP errors reported as Invalid Login-Form

Summary

When the IdP being checked reports that "An error occurred", ECCS marks it as "Invalid Login-Form".

Steps to reproduce

Retry the check on IdPs marked with ERROR results and "Invalid Login-Form".

What is the current bug behavior?

ECCS does not take into account that the IdP reported an error.

What is the expected correct behavior?

ECCS results should show that the IdP reported and error.

Relevant logs and/or screenshots

No logs/screenshots.

Possible fixes

Create a new test for IdP reported errors and a new "IdP error" ERROR class.