Bug 1302689 - Update WebTest from 2.0.21 to 2.0.23
Bug 1302689 - Update WebTest from 2.0.21 to 2.0.23

https://github.com/Pylons/webtest/blob/master/CHANGELOG.rst
https://github.com/Pylons/webtest/compare/2.0.21...2.0.23

tojon/treeherder,edmorley/treeherder,KWierso/treeherder,tojonmz/treeherder,edmorley/treeherder,tojonmz/treeherder,kapy2010/treeherder,tojonmz/treeherder,tojonmz/treeherder,tojonmz/treeherder,kapy2010/treeherder,edmorley/treeherder,kapy2010/treeherder,tojon/treeherder,kapy2010/treeherder,edmorley/treeherder,KWierso/treeherder,tojon/treeherder,kapy2010/treeherder,KWierso/treeherder,tojon/treeherder,KWierso/treeherder,tojonmz/treeherder