User without cluster-admin role cannot modify the Route's hostname

Issue

• A user who doesn't have cluster-admin privileges cannot modify the Route's .spec.host value.

• When trying to edit the Route's .spec.host, get the following error message:

  $ oc edit route <route-name>
  # routes.route.openshift.io "<route-name>" was not valid:
  # * spec.host: Invalid value: "<hostname>": field is immutable
  
  error: routes.route.openshift.io "route-name" is invalid
  A copy of your changes has been stored to "/tmp/oc-edit-xxx.yaml"
  error: Edit cancelled, no valid changes were saved.