Add bugs_closed field in matching for guessing review id on `rbt post --update`

Review Request #8611 — Created Jan. 11, 2017 and updated — Latest diff uploaded




Company I work for using review board a lot, and it's a good tool. I noticed that if I change summary of review, it will be rare first in match when rbt tries to guess review id. Also, as my expirience says, it is rare that bugs_closed field gets changed over changes on task. So, I guess it will be good if guessing will depend not only on summary & description, but also on bugs_closed field.