INFRA-597-input-metadata-fix

Why these changes are being introduced:
* Input metadata was not being added to valid items as it was with invalid items

How this addresses that need:
* Update validate_aip_bulk_worker to include all input metadata for valid items
* Add TestValidateAipBulkWorker class with associated unit tests
* Update test_validate_secret_mismatch to address linting error
* Update dependencies

Side effects of this change:
* None

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/INFRA-597

Author: ehanson8