I can create Mapped Products with ERC

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 7.4 DXP U3
• Fix Version/s: 7.4 DXP U4
• Component/s: Product Information Management
• Labels: None
• Story Points: 0.5
• Git Pull Request: https://github.com/liferay-commerce/liferay-portal/pull/1733
• Epic Link: Complete Shop by Diagram 1/2
• Sprint: PIM Sprint 7, PIM Sprint 8

1. Go to http://localhost:8080/o/api?endpoint=http://localhost:8080/o/headless-commerce-admin-catalog/v1.0/openapi.json in order to check the Mapped Product POST endpoint by external reference code
2. Do a POST call
3. Check Mapped Product GET endpoint by external reference code
4. Do a GET call

Expected result: The information sent in the POST call will be visible in the GET call response.