Orphaned maven-metadata files not cleaned up

On NXRM 3.29, orphaned maven-metadata.xml, sha1, md5, sha256 and sha512 files brought over from an upgrade are not removed by cleanup policies.

To reproduce

1. On NXRM version pre 3.29, run a gradle deploy to a maven repo with a permissive layout.
2. Configure and run a cleanup policy against the maven repo e.g. based on published date and confirm that all files except the sha256 and sha512 files are removed.
3. Upgrade the instance to 3.29 and run cleanup policy again.

Expected

Orphaned maven-metadata.xml, sha1, md5, sha256 and sha512 files are removed.

Actual

Orphaned maven-metadata.xml, sha1, md5, sha256 and sha512 files are not removed.

Workaround

Manually delete the orphaned files/directories.