title: Deleting namespace hangs on custom resource finalizer
body: <p>I have defined a controller (Operator) for handling some Custom Resources in my K8S namespace.
  each custom resource has a Finalizer so the controller can handle it before it is being deleted:</p>
  
  <p>e.g.</p>
  
  <pre><code>kind: MyCustom
  metadata:
   finalizers:
      - MyCustom.finalizers.com
   name: mycustomResourceInstance
  </code></pre>
  
  <p>this works well, until I delete the namespace ("kubectl delete ns").
  if k8s garbage collects the controller pod first - "mycustomResourceInstance" remains stuck in a deleting state, and prevents successful namespace removal.</p>
  
  <p>work around is to edit mycustomResourceInstance and remove the finalizer.</p>
  
  <p>is there any way to make sure the controller does not get deleted, while any instances of the custom resource exist in the namespace?</p>