Rename ArchiveForUser and ArchiveForRepack

I clone the closed issue: CTA-old#868 (closed)

@vlado wrote:

The For word in the ArchiveForUser and ArchiveForRepack does not add any value and only occupies precious column space in the output of the cta-admin sq and cta-admin dr ls commands.

On top of that, the type and request columns are align to the right so that is badly matching the names.

I propose to rename the two like this:

• ArchiveForUser -> UserArchive
• ArchiveForRepack -> RepackArchive

These new names take up less space and work with right allignment.

Thanks for considering.