Description of problem:
When setting the "passthrough" termination policy via annotation feature for the ingress object (Jira: NE-359). The ingress and the corresponding route object gets created but the "route" object does not have the "termination type" field set. This as a result cause the route to be unreachable.

Version-Release number of selected component (if applicable):
* 4.6.0-0.nightly-2020-08-03-025909

How reproducible:
* Always when creating ingress object with "passthrough" annotation. 

Steps to Reproduce:
1.Create and deploy ingress resource with "passthrough" annotation: 
----
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-secure
  annotations:
    route.openshift.io/termination: "passthrough"
spec:
  rules:
  - host: service-secure-pr-124.internalapps.aiyengar-cioc46-3007.qe.devcluster.openshift.com
    http:
      paths:
      - backend:
          serviceName: service-secure
          servicePort: 27443

$ oc create -f ingress-passthrough.yaml
ingress.extensions/ingress-secure created
----

2. Check the output of "get" ingress and route commands:
3. Test the connection through the route. 

Actual results:
* The ingress and the corresponding route object gets created but the "termination type" is missing in the route:
----
$ oc get ingress
NAME             CLASS    HOSTS                                                                                 ADDRESS   PORTS   AGE
ingress-secure   <none>   service-secure-pr-124.internalapps.aiyengar-cioc46-3007.qe.devcluster.openshift.com             80      5s

$ oc get route
NAME                   HOST/PORT                                                                                        PATH   SERVICES         PORT    TERMINATION   WILDCARD
ingress-secure-ptmlq   service-secure-pr-124.internalapps.aiyengar-cioc46-3007.qe.devcluster.openshift.com ... 1 more          service-secure   https                 None    <--

$ oc get route ingress-secure-ptmlq -o yaml
spec:
  host: service-secure-test-1.internalapps.aiyengar-oc46-0308.qe.devcluster.openshift.com
  port:
    targetPort: https
  to:
    kind: Service
    name: service-secure
    weight: 100
  wildcardPolicy: None
----

Expected results:
The termination type should be present in the route object for the router to identify it as passthrough. Reference to creating a default route object:
-----
$ oc create route passthrough passth --hostname=service-secure-test-1.internalapps.aiyengar-oc46-0308.qe.devcluster.openshift.com --service=service-secure
route.route.openshift.io/passth created

$ oc get route
NAME     HOST/PORT                                                                                      PATH   SERVICES         PORT    TERMINATION   WILDCARD
passth   service-secure-test-1.internalapps.aiyengar-oc46-0308.qe.devcluster.openshift.com ... 1 more          service-secure   https   passthrough   None

$ oc get route passth -o yaml
spec:
  host: service-secure-test-1.internalapps.aiyengar-oc46-0308.qe.devcluster.openshift.com
  port:
    targetPort: https
  tls:
    termination: passthrough <---
  to:
    kind: Service
    name: service-secure
    weight: 100
  wildcardPolicy: None
-----