fog/fog — pull request #1213 by Keoven (2012-10-18 05:48:54+00:00)
Title: [openstack] Ensure String Username for Authentication

When username is composed of only integers, openstack raises a
ProgrammingError when trying to authenticate user.

-- I am actually even unsure if it should be allowed that a user to have a username composed of all numbers, anyway OpenStack allows it, so here's the pull request.