[heat] Gerrit breach and commit audit

Hi All,

As suggested by the recent announcement of gerrit breach [1], I have audited all commits for heat repos and confirmed that everything looks good.

[1] http://lists.opendev.org/pipermail/service-announce/2020-October/000011.html

Sorry for any inconvenience. Also feel free to ping me or any of our core reviewers and ask for review on your patches.

Best Regards,