Add small UX adjustment and redirect to login page instead of `sso_…

…login` (MIT-LCP#2349)

When the ORCID user clicks the activate link it is activated and
redirected to ORCID login. When the user clicks it again it is already
activated and redirected to SSO login (EduGain) which is a bad UX as its
account is linked with ORCID, not with EduGain.

This PR changes this behaviour and redirects to the login page.

physionet-django/user/views.py

@@ -649,7 +649,7 @@ def activate_orcid_user(request, uidb64, token):
 
     if user and user.is_active:
         messages.success(request, 'The account is active.')
-        return redirect('sso_login')
+        return redirect('login')
 
     if default_token_generator.check_token(user, token):
         with transaction.atomic():