[cloud] cloudformation: create changeset when stack is in ROLLBACK_COMPLETE. Fixes #27853 (#28832)
[cloud] cloudformation: create changeset when stack is in ROLLBACK_COMPLETE. Fixes #27853 (#28832)

Fix appearance of failure when creating a cloudformation changeset after a rollback. When creating a cloudformation changeset it shouldn't matter if the last event was. 

_ROLLBACK_COMPLETE since creating a changeset is not an event. Fixes #27853.
thaim/ansible,thaim/ansible