Cleanup unused/out of date code (fixes #7645, #7677)

* Remove thumbnail-related code (fixes #7645)
* Removes old `*_to_dpla` modules superseded by newer Mapper classes
(fixes #7677).
* Removes associated tests if no longer relevant, or changes
existing tests to use the `dpla_mapper` endpoint instead (refs #7677).
* Modifies `IAMapper().map_intermediate_provider()` to not throw
a `KeyError` if `metadata/collection` does not exist in IA metadata
(refs #7677).
* Rename Hathi test to reflect purpose and additional cleanup
* Delete old Harvard Virtual Campus profile
* Point test_enrich.py non-run tests at proper endpoint
* Fix CouchDB tests because of change to use mapper class
Merge pull request #12 from dpla/7645-7677-remove-unused-code

Remove unused code (fixes #7645 and #7677)
GPO: Set URI for object property (refs #7519)
Merge pull request #17 from dpla/7519-gpo-add-object-uri-take-2

GPO: Set URI for object property (refs #7519)
Have save_records.py use sync_qa_views (fixes #7680)

Also explicitly sets the sync_qa_views parameter when running Couch tests
Merge pull request #18 from dpla/7680-set-syncqaviews-for-save

Have save_records.py use sync_qa_views (fixes #7680)
Bump version to 32.2.0
Set log level for couch.py (fixes #7688)
Merge pull request #19 from dpla/7688-couch-loglevel

Set log level for couch.py (fixes #7688)
Add module to strip HTML tags (#7636)

New module 'strip_html' strips HTML, compacts consecutive
whitespace, converts HTML entities, and strips whitespace from
the ends of strings, recursively for the given JSON document.