kubevirt: description and properties are missing in swagger JSON

/kind bug

What happened:

description and properties of VirtualMachine, VirtualMachineInstance, etc. are missing in swagger JSON

Only this info is available for VirtualMachine

"io.kubevirt.v1alpha3.VirtualMachine": {
  "type": "object",
  "x-kubernetes-group-version-kind": [
    {
      "group": "kubevirt.io",
      "kind": "VirtualMachine",
      "version": "v1alpha3"
    }
  ]
},

compared to VirtualMachineList

"io.kubevirt.v1alpha3.VirtualMachineList": {
  "description": "VirtualMachineList is a list of VirtualMachine",
  "required": [
    "items"
  ],
  "properties": {
    "apiVersion": {
      "description": "APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest interna       l value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources",
      "type": "string"

What you expected to happen:

Properties and description should be available.

How to reproduce it (as minimally and precisely as possible):

curl localhost:8001/openapi/v2

Anything else we need to know?:

affects openshift/kubevirt UI: https://bugzilla.redhat.com/show_bug.cgi?id=1732329

Environment:

• KubeVirt version (use virtctl version):

Client Version: version.Info{GitVersion:"v0.17.4", GitCommit:"adfdb8c07830b99fc79d2fd1d004e862ef70979e", GitTreeState:"clean", BuildDate:"2019-06-27T14:07:33Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{GitVersion:"v0.17.4", GitCommit:"adfdb8c07830b99fc79d2fd1d004e862ef70979e", GitTreeState:"clean", BuildDate:"2019-06-27T14:08:17Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}

• Kubernetes version (use kubectl version):

Client Version: version.Info{Major:"1", Minor:"12+", GitVersion:"v1.12.4+509916ce1", GitCommit:"509916ce1", GitTreeState:"clean", BuildDate:"2019-03-28T17:17:29Z", GoVersion:"go1.10.8", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"12+", GitVersion:"v1.12.4+0ba401e", GitCommit:"0ba401e", GitTreeState:"clean", BuildDate:"2019-03-31T22:28:12Z", GoVersion:"go1.10.8", Compiler:"gc", Platform:"linux/amd64"}