Description of problem:
The hpa generated by `oc autoscal` command  can't get metrics, always failed with "FailedGetScale  the HPA controller was unable to get the target's current scale: no matches for /, Kind=DeploymentConfig"

Version-Release number of selected component (if applicable):
openshift v3.9.0-0.34.0
kubernetes v1.9.1+a0ce1bc657
etcd 3.2.8

How reproducible:
Always


Steps to Reproduce:
1.Create a dc
# oc create -f https://raw.githubusercontent.com/openshift-qe/v3-testfiles/master/hpa/dc-hello-openshift.yaml -n dma

2.Create the hpa by `oc autoscale` command
oc autoscale dc/hello-openshift --min=2 --max=10 -n dma

3.Check the hpa status
# oc get hpa -n dma
NAME              REFERENCE                          TARGETS           MINPODS   MAXPODS   REPLICAS   AGE
hello-openshift   DeploymentConfig/hello-openshift   <unknown> / 80%   2         10        0          34s
# oc describe hpa hello-openshift -n dma
Name:                                                  hello-openshift
Namespace:                                             dma
Labels:                                                <none>
Annotations:                                           <none>
CreationTimestamp:                                     Wed, 31 Jan 2018 09:51:13 +0000
Reference:                                             DeploymentConfig/hello-openshift
Metrics:                                               ( current / target )
  resource cpu on pods  (as a percentage of request):  <unknown> / 80%
Min replicas:                                          2
Max replicas:                                          10
Conditions:
  Type         Status  Reason          Message
  ----         ------  ------          -------
  AbleToScale  False   FailedGetScale  the HPA controller was unable to get the target's current scale: no matches for /, Kind=DeploymentConfig
Events:
  Type     Reason          Age   From                       Message
  ----     ------          ----  ----                       -------
  Warning  FailedGetScale  14s   horizontal-pod-autoscaler  no matches for /, Kind=DeploymentConfig

# oc get hpa hello-openshift -n dma -o yaml
apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
  annotations:
    autoscaling.alpha.kubernetes.io/conditions: '[{"type":"AbleToScale","status":"False","lastTransitionTime":"2018-01-31T09:51:43Z","reason":"FailedGetScale","message":"the
      HPA controller was unable to get the target''s current scale: no matches for
      /, Kind=DeploymentConfig"}]'
  creationTimestamp: 2018-01-31T09:51:13Z
  name: hello-openshift
  namespace: dma
  resourceVersion: "36303"
  selfLink: /apis/autoscaling/v1/namespaces/dma/horizontalpodautoscalers/hello-openshift
  uid: 45f4727e-066c-11e8-991b-fa163e00917e
spec:
  maxReplicas: 10
  minReplicas: 2
  scaleTargetRef:
    apiVersion: v1
    kind: DeploymentConfig
    name: hello-openshift
  targetCPUUtilizationPercentage: 80
status:
  currentReplicas: 0
  desiredReplicas: 0


Actual results:
3. Failed to get metrics.

Expected results:
3. Should get metrics success

Additional info:
After update spec.scaleTargetRef.apiVersion to "apps.openshift.io/v1", the hpa can get metrics successfully.