Merge pull request #79 from johngian/fix-logout-call

Fix logout url call after import.

Author: johngian

mozilla_django_oidc/views.py

@@ -121,7 +121,7 @@ def dispatch(self, request, *args, **kwargs):
             # Check if a method exists to build the url to logout the user from the OP
             logout_from_op = import_from_settings('OIDC_OP_LOGOUT_URL_METHOD', '')
             if logout_from_op:
-                logout_url = import_string(logout_from_op)
+                logout_url = import_string(logout_from_op)()
 
             # Log out the Django user.
             auth.logout(request)