Comment 5 for bug 1081861

Fine, I prefer changing password to unicode string, rather than reporting error "password not string".

https://review.openstack.org/17107

commit 6bc5e53b1d58ee87f360f20e6942c3c2f8d1712f
Author: Wu Wenxiang <wu.wenxiang@99cloud.net>
Date: Thu Nov 29 13:49:52 2012 +0800

    bug(1081861): Ensure password was unicode when creating user

    Add function _unicode_dict() in class Application, then call this function in UserController::create_user()

    Change-Id: I5fcc2cddc706eb2c69aa9596ac83e70c6f8f0e46