Story 5: Develop scaffolding code for managing `Trade` Entity:

[ebouchut]

Story 5: Develop scaffolding code for managing Trade Entity:

Implement the RESTFUL API for:

1. Creating a Trade Entity to do the Spring Data Repository
2. Reading a Trade Entity from the existing Spring Data Repository
3. Updating a Trade Entity from the existing Spring Data Repository
4. Deleting a Trade Entity from the existing Spring Data Repository