Description of problem:
After trying to delete a namespace with some resource inside (Secret/VM), the apiservice resource 'openshift-monitoring/prometheus-adapter' is on FailedDiscoveryCheck, this causes the namespace deletion to be stuck on 'Terminating'

After deleting the apiservice (oc delete apiservice v1beta1.metrics.k8s.io) the namespace do get deleted after 1-3 minutes, and the issue does not repeat.

Version-Release number of selected component (if applicable):
4.14

How reproducible:
Need more investigation but seen more then a few times on different clusters

Steps to Reproduce:
1. Create a VM in a namespace
2. Delete the namespace

Actual results:
The namespace is stuck on Terminating

Expected results:
The namespace and all resources should be deleted

Additional info:
It is not clear if the apiservice failure is a side effect of another issue or it is what is causing this.