[glance] Gerrit breach and commit audit

Hi All,

As suggested by the recent announcement of gerrit breach [1], I have audited all commits for glance repo (glance, glance_store, glanceclient) and confirmed that everything looks good.

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

Thanks & Best Regards,

Abhishek Kekane