Currently, whenever you change the project name it, cost management will keep the previous project name. This is because we are doing a on conflict do nothing here: https://github.com/project-koku/koku/blob/18d0bd98c8002e46590d88e945e5ddf8f995c54d/koku/masu/processor/gcp/gcp_report_processor.py#L259

We need to flip this to a on conflict do update.