Ensure dataProvider gets set (fixes #7679)

12 profiles were missing the 'copy_prop' enrichment that copies
provider.name to dataProvider if dataProvider is empty. This commit
also removes GPOMapper.update_data_provider() to prefer the solution
of using the 'copy_prop' enrichment.
Merge branch 'release-v33.1.6' into develop
Update MDL endpoint (fixes #7710)
Merge pull request #39 from dpla/7710-update-mdl-endpoint

Update MDL endpoint (fixes #7710)
Merge pull request #36 from dpla/7679-ensure-dataprovider

Ensure `dataProvider` gets set (fixes #7679)
Remove old SCDL-specific code (refs #7647)
* Delete scdl-charleston and scdl-usc profiles
* Retain clemson profile (for tests)
* Remove CharlestonMapper and tests
* Remove Charleston mapper creation call from create_mapper
Merge pull request #40 from dpla/cleanup-scdl-profiles

Remove old SCDL-specific code (refs #7647)
IA: generate sourceResource.title correctly (fixes #7708)

Given IA metadata like the following:
{"title": ["Foo", "bar"], "volume": "1880"}
IAMapper should generate sourceResource.title as such:
{"sourceResource": {"title": ["Foo, 1880", "bar, 1880"]}}
IA: Add YIVO Institute Library (fixes #7735)
Merge pull request #41 from dpla/7708-fix-ia-title-take-2

IA: generate sourceResource.title correctly (fixes #7708)
Create release v33.2.0
Merge branch 'release-v33.2.0'