Fixes bug that prevented users from being created.
proper user creation in OS create_server mock
@dprince - could you review this for us? Thanks!
@geemus @dprince any chance this can get in?
@kuinak - sorry for the delay. Afraid I really don't know open stack side very well though.
@ohadlevy @rupakg - could one of you guys check this out?
@kuinak: sorry this slipped through the cracks for so long. Looks good to me.