Bug fix: post-review creates unpublishable draft on submitted review requests

Review Request #3085 — Created April 29, 2012 and submitted — Latest diff uploaded

Information

RBTools

Reviewers

This fixes Issue:2549. 
I went with the first suggestion (not allowing updates), but I can also look into re-opening the issue upon publishing, if everyone likes that option better.
manual
ran rbtools/tests.py (although they were mostly unrelated)