Fix HTTP 403 error on python 2.7
Fix HTTP 403 error on python 2.7

On python 2.7, urllib2.HTTPError.reason is a property and not a variable, so
assignment is disallowed. Commenting out the line works just fine.

Review: https://codereview.appspot.com/6490072/

riannucci/rietveldv2,riannucci/rietveldv2