Cleanup ROLLBACK_COMPLETE stack after the test finishes

Change-Id: Ia457aa7025c464a9dec78e95757d85c977307560
Closes-Bug: #1727632
diff --git a/heat_tempest_plugin/common/test.py b/heat_tempest_plugin/common/test.py
index 39a090c..c1108e2 100644
--- a/heat_tempest_plugin/common/test.py
+++ b/heat_tempest_plugin/common/test.py
@@ -594,7 +594,7 @@
             environment_files=environment_files,
             timeout_mins=timeout_mins
         )
-        if expected_status not in ['ROLLBACK_COMPLETE'] and enable_cleanup:
+        if enable_cleanup:
             self.addCleanup(self._stack_delete, name)
 
         stack = self.client.stacks.get(name, resolve_outputs=False)