Ingress objects create Route objects with the wrong port

Issue

• When you create an Ingress object in OpenShift Container Platform, then the generated Route object has the targetPort of the Pod assigned, not the one of the Service (should be http-default):

  $ oc apply -f - << EOF
  apiVersion: v1
  kind: Service
  metadata:
  name: app
  spec:
  ports:
  - name: http-default
    port: 8080
    protocol: TCP
    targetPort: default
  selector:
    deployment: app
  EOF
  
  $ oc apply -f - << EOF
  apiVersion: extensions/v1beta1
  kind: Ingress
  metadata:
  name: app
  spec:
  rules:
  - host: app.test.com
    http:
      paths:
      - backend:
          serviceName: app
          servicePort: http-default
        path: /
  EOF
  
  $ oc get route app-6dqpg -o yaml
  apiVersion: route.openshift.io/v1
  kind: Route
  metadata:
  [...]
  spec:
  host: app.test.com
  path: /
  port:
    targetPort: default
  to:
    kind: Service
    name: app
  [...]