Fix unit tests

Author: Ostap-Zherebetskyi

osf_tests/test_institution.py

@@ -146,15 +146,15 @@ def test_reactivate_sso_institution(self):
         institution.save()
         institution.reactivate()
         assert institution.deactivated is None
-        assert institution.sso_availability == 'hidden'
+        assert institution.sso_availability == 'Hidden'
 
     def test_reactivate_institution(self):
         institution = InstitutionFactory()
         institution.deactivated = timezone.now()
         institution.save()
         institution.reactivate()
         assert institution.deactivated is None
-        assert institution.sso_availability == 'unavailable'
+        assert institution.sso_availability == 'Unavailable'
 
     def test_send_deactivation_email_call_count(self):
         institution = InstitutionFactory()