Fix OpenAPI spec linting recommendations

(from default Spectral ruleset)

Author: bkimminich

swagger.yml

@@ -9,13 +9,16 @@ info:
   license:
     name: MIT
     url: 'https://opensource.org/licenses/MIT'
+  contact:
+    name: B2B API Support
 tags:
   -
     name: Order
     description: 'API for customer orders'
 paths:
   /orders:
     post:
+      operationId: createCustomerOrder
       tags: [Order]
       description: 'Create new customer order'
       responses: { '200': { description: 'New customer order is created', content: { application/json: { schema: { $ref: '#/components/schemas/OrderConfirmation' } } } } }
@@ -32,7 +35,7 @@ components:
       properties: { cid: { type: string, uniqueItems: true, example: JS0815DE }, orderLines: { $ref: '#/components/schemas/OrderLines' }, orderLinesData: { $ref: '#/components/schemas/OrderLinesData' } }
     OrderConfirmation:
       required: [cid, orderNo, paymentDue]
-      properties: { cid: { type: string, uniqueItems: true, example: JS0815DE }, orderNo: { type: string, uniqueItems: true, example: 3d06ac5e1bdf39d26392f8100f124742 }, paymentDue: { description: 'All payments are due 14 days after order placement', type: string, format: date, example: '2018-01-19T07:02:06.800Z' } }
+      properties: { cid: { type: string, uniqueItems: true, example: JS0815DE }, orderNo: { type: string, uniqueItems: true, example: 3d06ac5e1bdf39d26392f8100f124742 }, paymentDue: { description: 'All payments are due 14 days after order placement', type: string, format: date, example: '2018-01-19' } }
     OrderLine:
       description: 'Order line in default JSON format'
       required: [productId, quantity]