CPM-724: Update uuid requirement

Author: pierallard

content/swagger/akeneo-web-api.json

@@ -103,6 +103,7 @@ patch:
       in: body
       schema:
         $ref: "#/definitions/ProductUuid"
+        required: ["uuid"]
         x-examples:
           x-example-1:
             '{"uuid":"fc24e6c3-933c-4a93-8a81-e5c703d134d5","values":{"description":[{"scope":"ecommerce","locale":"en_US","data":"My amazing cap"}]}}'