Fixes object versioning when object name and/or version
container name contain multibyte utf-8 characters.
When object names containing non-ASCII characters
are PUT multiple times into a container with an
x-versions-location set, subsequent DELETE of the
object results in a 500 response status.
When the versions container name contains
non-ASCII characters the first delete of an object
succeeds but fails to restore previous version of
object, so second delete incorrectly returns 404.
Fixes bug 1229142
Change-Id: I425440f76b8328f8e119d390bfa4c7022181e89e
fa308d60bd