Description of problem:
Check clusteroperator machine-config, the Upgradeable ClusterStatusConditionType is missing.
https://github.com/openshift/api/blob/master/config/v1/types_cluster_operator.go#L135


Version-Release number of selected component (if applicable):
4.2.0-0.nightly-2019-06-30-221852

How reproducible:
Always

Steps to Reproduce:
1.Check clusteroperator machine-config's detail.
oc get co machine-config -o yaml

Actual results:
ClusterOperator machine-config missing ClusterStatusConditionType Upgradeable

Expected results:
ClusterStatusConditionType Upgradeable is there with proper value.

Additional info:
$ oc get co machine-config -o yaml
apiVersion: config.openshift.io/v1
kind: ClusterOperator
metadata:
  creationTimestamp: "2019-07-03T03:51:42Z"
  generation: 1
  name: machine-config
  resourceVersion: "13332"
  selfLink: /apis/config.openshift.io/v1/clusteroperators/machine-config
  uid: de9945e8-9d45-11e9-945d-023561f97408
spec: {}
status:
  conditions:
  - lastTransitionTime: "2019-07-03T03:52:17Z"
    message: Cluster has deployed 4.2.0-0.nightly-2019-06-30-221852
    status: "True"
    type: Available
  - lastTransitionTime: "2019-07-03T03:52:18Z"
    message: Cluster version is 4.2.0-0.nightly-2019-06-30-221852
    status: "False"
    type: Progressing
  - lastTransitionTime: "2019-07-03T03:51:42Z"
    status: "False"
    type: Degraded
  extension:
    master: all 3 nodes are at latest configuration rendered-master-5cbc352535b9631c274f14b4ec4f2c99
    worker: all 2 nodes are at latest configuration rendered-worker-e9bf5b3eff2737e9d5277d4fc8e7808a
  relatedObjects:
  - group: ""
    name: openshift-machine-config-operator
    resource: namespaces
  - group: machineconfiguration.openshift.io
    name: master
    resource: machineconfigpools
  - group: machineconfiguration.openshift.io
    name: worker
    resource: machineconfigpools
  - group: machineconfiguration.openshift.io
    name: cluster
    resource: controllerconfigs
  versions:
  - name: operator
    version: 4.2.0-0.nightly-2019-06-30-221852