Fix env passed to test_replace

We don't seem to be passing the right env to test_replace,
when we want to test with both update and replace restricted.

Change-Id: I895389c1727321f328e6b7bd7c712796257993f1
diff --git a/functional/test_update_restricted.py b/functional/test_update_restricted.py
index ae1907b..1634192 100644
--- a/functional/test_update_restricted.py
+++ b/functional/test_update_restricted.py
@@ -95,7 +95,7 @@
 
         # check replace fails - with 'both' restricted
         self.update_stack(stack_identifier, update_template,
-                          env_replace_restrict,
+                          env_both_restrict,
                           expected_status='UPDATE_FAILED')
 
         self.assertTrue(self.verify_resource_status(stack_identifier, 'bar',