this is a command like next work, the difference is the cert throw out by it is the one pending on reviewer to review certs. eg: hwertbot next pack review

This command will be used by interns of reviewer team. After interns use this command to get the pack_review cert, please remove it from next work queue, because we need to avoid reviewers and interns work on the same cert at the same time. 
After interns finish the pack_review on these certs, please sent it back to next work queue. So that reviewers can work with other works of this cert. this may need a new command like: hwcertbot put pack back