Description of problem:

`oc explain MachineSet.spec --recursive=true` returns empty description and no fields.

Version-Release number of selected component (if applicable):

$ oc get clusterversion
NAME      VERSION   AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.3.13    True        False         19h     Cluster version is 4.3.13

How reproducible:

Always.

Steps to Reproduce:
1. oc explain MachineSet.spec --recursive=true
2.
3.

Actual results:

KIND:     MachineSet
VERSION:  machine.openshift.io/v1beta1

DESCRIPTION:
     <empty>

Expected results:

KIND:     MachineSet
VERSION:  machine.openshift.io/v1beta1

RESOURCE: spec <Object>

DESCRIPTION:
     <empty>

FIELDS:
   deletePolicy	<string>
   minReadySeconds	<integer>
   replicas	<integer>
   selector	<map[string]>
   template	<Object>
      metadata	<map[string]>
      spec	<Object>
         metadata	<map[string]>
         providerID	<string>
         providerSpec	<Object>
            value	<map[string]>
         taints	<[]map[string]>

Additional info:

I haven't confirmed directly, however I'm hearing the same results occur using 4.4. I didn't see a BZ yet specific to MachineSet.spec as of yet, though, so here 'tis!