eg: partner create a brand new cert#100 next a layered cert#200(eg: RHOS cert) based on cert#100 is generated unfortunately, cert#100 is moved to dustbin by some reason before it's closed. Then cert#200 maybe become an orphan. Now this orphan RHOS cert will not step into any queue. So we need a queue to monitor orphan certs to keep these certs in reviewer's sight.
A new command for bot is added to search orphaned certs: hwcertbot, orphaned cert