Fix PyFlakes warnings in Review Board.
Review Request #5459 — Created Feb. 11, 2014 and submitted — Latest diff uploaded
Fix PyFlakes warnings in Review Board.
We had a number of PyFlakes warnings from recent changes that weren't
addressed. This cleans them all up, getting back to 0 warnings or
errors.
Ran pyflakes and didn't see any more errors.
Unit tests passed.