Remove Python 2.6 deprecation warning from post-review

Review Request #776 — Created March 18, 2009 and submitted — Latest diff uploaded


Review Board SVN (deprecated)


post-review spits out a deprecation warning when run with python 2.6 (the md5 module is deprecated).  This patch should squelch the warning, and maintain compatibility with older versions of Python.
Ran under 2.4, 2.5, and 2.6, and seems ok.