Ceph

Support for rados export/import:

Given a directory export will do the following:

All default namespace objects will be stored in the top-level directory as before. Each namespace will create a sub-directory with the name of the namespace and store the those namespace objects in the sub-directory.

Import use the export directory structure to create all the objects in the appropriate namespaces.

For now we will disable rados export/import (see feature #9403 to re-enable).