Make sure we print a failure hipchat message in finish_with_rollback().

Our hubot Sun Wukong looks for this failure message to know that the
deploy is finished, and we weren't printing it in the
finish-with-rollback case!  Now we do.  Conceptually,
finish-with-rollback is just rollback + finish-with-failure anyway.

Auditors: chris

Test Plan:
Fingers crossed.