Comment 11 for bug 1714248

... another possible fix is to change the ComputeNode.uuid to match the ironic_node.uuid, but we hit the same race above on the first restart after we make this change, as we delete all the auto-generated ComputeNode.uuids and update them to ironic_node.uuids. Although at least we only hit the nasty re-calculate race once... Yuck again.