Object string attributes should support unicode

[Dan Smith]

All of our objects use bare strings, which means unicode values are not permitted, although they should be. LP#1218719 is related, and the "fix" for it was incomplete and didn't address the underlying problem.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/45298

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/45298
Committed: http://github.com/openstack/nova/commit/61bedc9aa04b0bac21e5c4bd17d6d2c09e2d9e01
Submitter: Jenkins
Branch: master

commit 61bedc9aa04b0bac21e5c4bd17d6d2c09e2d9e01
Author: Dan Smith <email address hidden>
Date: Thu Sep 12 13:40:57 2013 -0700

    Fix non-unicode string values on objects

    Originally, all of the objects used str() to specify string type
    attributes. This prevents the use of unicode values. A previous
    patch errantly updated the utility function without bumping all
    of the affected objects' versions. This does that, and also
    fixes the issue for bare str() attributes.

    Change-Id: Iad83589d399309b95c32813a1a660a12e571066b
    Closes-bug: 1221346

[Dan Smith (danms)]

The fix for this got partially broken during a rebase. Patch coming soon.

[Thierry Carrez (ttx)]

Re-fixed with https://review.openstack.org/#/c/48526/