QA (BACKEND) - Implement #find for vocabularies

[ShanaLMoore]

Summary

This work is to update the questioning authority gem.

ref: https://github.com/samvera/questioning_authority/wiki/Connecting-to-Library-of-Congress-%28LOC%29#accessing-via-qa

Bulkrax error received when importing the following sample file:

212.csv

Error: Qa::TermNotFound - http://id.loc.gov/authorities/graphicMaterials/tgm008083 Not Found - Term may not exist at LOD Authority. (HTTPNotFound - 404)

The client has listed the following LOC uri as a controlled value.

https://id.loc.gov/vocabulary/graphicMaterials/tgm008083.html

However QA does not support anything other than authorities with its #find method (yet)

Acceptance Criteria

• a user should be able to import the above sample file via bulkrax. The controlled value uris should resolve to actual labels.
• Upate wiki documentation for LOC to reflect updates.

Testing Instructions

1. Import the above sample file
2. Visit the Image it creates. Subject should display labels instead of uris.

Notes

Search uses #build_query_url(q) which supports more routes.

wiki states:

for search: Subauthorities include authorities, vocabularies, datatypes, and preservation as defined in [loc_subauthorities.rb](https://github.com/samvera/questioning_authority/blob/master/lib/qa/authorities/loc_subauthority.rb).
for term: Subauthorities include only the authorities listed in [loc_subauthorities.rb](https://github.com/samvera/questioning_authority/blob/master/lib/qa/authorities/loc_subauthority.rb).”

[ShanaLMoore]

[ShanaLMoore]

PR started: samvera/questioning_authority#379

[jillpe]

No longer necessary