mitchellh/packer — pull request #1418 by msabramo (2014-08-15 07:35:21+00:00)
Title: OpenStack builder: Make region not required

Perhaps "region" is required when using a public provider like
Rackspace? It's not required for my private cloud from Metacloud. I
suspect a lot of private clouds have only a single region and thus don't
need "region" to be specified.