Openshift diagsnotics check gives error retaled to MetricsApiProxy

Issue

• Running: # oc adm diagnostics metricsapiproxy you will get the following error:

  ERROR: [DClu4003 from diagnostic MetricsApiProxy@openshift/origin/pkg/oc/admin/diagnostics/diagnostics/cluster/metrics.go:89]
         Unable to access the metrics API Proxy endpoint /api/v1/proxy/namespaces/openshift-infra/services/https:heapster:/api/v1/model/metrics:
         (*errors.StatusError) the server could not find the requested resource
         The Horizontal Pod Autoscaler is not able to retrieve metrics to drive scaling.