fix(medusa): draft order set payment as captured (#2479)

**What**
- when an order is created from a draft order, set the payment of the order as captured

FIXES CORE-592

integration-tests/api/__tests__/admin/draft-order.js

@@ -649,18 +649,19 @@ describe("/admin/draft-orders", () => {
       )
 
       expect(orderResponse.status).toEqual(200)
-      // expect newly created order to have id of draft order and system payment
+      // expect newly created order to have id of draft order
       expect(createdOrder.data.order.draft_order_id).toEqual("test-draft-order")
-      expect(createdOrder.data.order.payments).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({ provider_id: "system" }),
-        ])
-      )
+      // expect system payment provider and the payment to be "captured"
+      expect(createdOrder.data.order.payments.length).toEqual(1)
+      expect(createdOrder.data.order.payments[0].provider_id).toEqual("system")
+      expect(createdOrder.data.order.payments[0].captured_at).not.toEqual(null)
+
       // expect draft order to be complete
       expect(updatedDraftOrder.data.draft_order.status).toEqual("completed")
       expect(updatedDraftOrder.data.draft_order.completed_at).not.toEqual(null)
     })
   })
+
   describe("GET /admin/draft-orders", () => {
     beforeEach(async () => {
       await adminSeeder(dbConnection)