During upgrade all custom resources are backed up to files on the
local file system. Since old versions are also backed up, we need to
reflect the version in the name.
Resource names are only unique per kind+ns. Without this patch it
might happen that there are two resources with the same name
in different namespaces. Upgrade might fail in that case.
These backups could be used in case an upgrade
misbehaves after helm declared it as successful.
The manual backups are required as helm-rollback
won't touch custom resources and changes to CRDs
delete resources of the old version.
