API tests for GET /eholdings/packages/{packageId}?include=provider endpoint are in https://github.com/folio-org/folio-api-tests/blob/master/mod-kb-ebsco/mod-kb-ebsco.postman_collection.json
Looking at the existing tests, looks like there are no API tests for this endpoint in the existing collection.

Add test cases in mod-kb-ebsco-java collection for this endpoint.

Acceptance Criteria:

• As development of endpoints progresses, ensure that API tests are being maintained/developed as well.

• Code should be reviewed and approved by peers and all tests should be passing.