Pass collection unitid to NoramlizedId for local use

[corylown]

Fixes #1608

If this gets merged I'll backport it to release-1.x

There's some related history, including that we seem to have deliberately left this out, but I'm not seeing a convincing reason why and a follow up issue was created to revisit. I can't see the harm in indexing names on components in names_ssim so they are searchable. And we have gotten at least one report of this as a problem.

• Index component-level names (corpname, famname, name, persname) via T… #634
• Revisit indexing decisions for <controlaccess> elements #654

Some things about how the existing SolrEAD setup indexes names data strike me as likely unintentional. E.g., at the component level only names wrapped in get added to names_ssim but at the document/collection level names_ssim includes component names that aren't wrapped in . But I thought better to try to stick to achieving parity for now, and revise this sort of thing later.