Refactor authentication system (#2602)

Make auth configuration available via UI, remove FOSUserBundle and SAML-Bundle dependency

tests/Saml/Security/SamlAuthenticationSuccessHandlerTest.php

@@ -10,7 +10,7 @@
 namespace App\Tests\Saml\Security;
 
 use App\Saml\Security\SamlAuthenticationSuccessHandler;
-use Hslavich\OneloginSamlBundle\Security\Authentication\Token\SamlToken;
+use App\Saml\Token\SamlToken;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Security\Http\HttpUtils;