Description of problem:
Cornice requires colander.drop, which was introduced in colander 1.0b1
Cornice is a requirement for Bodhi 2.
python-colander-1.0b1-3.el6 has been submitted as an update for Fedora EPEL 6.
python-colander-1.0b1-3.el6 has been pushed to the Fedora EPEL 6 stable repository. If problems still persist, please make note of it in this bug report.