allowing 'key' filed from JOI lib

Author: Sachin Maheshwari

common/helper.js

@@ -133,6 +133,7 @@ function validateEventPayload (event) {
       originator: Joi.string().required(),
       timestamp: Joi.string().required(),
       'mime-type': Joi.string().required(),
+      key: Joi.string(),
       payload: Joi.any()
     })
   })

index.js

@@ -42,7 +42,7 @@ swaggerTools.initializeMiddleware(swaggerDoc, function (middleware) {
   }))
 
   // Validate Swagger requests
-  //app.use(middleware.swaggerValidator())
+  app.use(middleware.swaggerValidator())
 
   // Route validated requests to appropriate controller
   app.use(middleware.swaggerRouter(options))