RBAC issue with configmappropagations

[matzew]

Describe the bug

Running HEAD on openshift, I get:

{
  "level": "error",
  "ts": "2020-02-25T14:14:19.430Z",
  "logger": "controller.knative-eventing-namespace-controller",
  "caller": "controller/controller.go:409",
  "msg": "Reconcile error",
  "commit": "0a14f71",
  "knative.dev/controller": "knative-eventing-namespace-controller",
  "error": "configMapPropagation: configmappropagations.configs.internal.knative.dev \"eventing\" is forbidden: cannot set blockOwnerDeletion if an ownerReference refers to a resource you can't set finalizers on: , <nil>",
  "stacktrace": "knative.dev/eventing/vendor/knative.dev/pkg/controller.(*Impl).handleErr\n\t/home/prow/go/src/knative.dev/eventing/vendor/knative.dev/pkg/controller/controller.go:409\nknative.dev/eventing/vendor/knative.dev/pkg/controller.(*Impl).processNextWorkItem\n\t/home/prow/go/src/knative.dev/eventing/vendor/knative.dev/pkg/controller/controller.go:395\nknative.dev/eventing/vendor/knative.dev/pkg/controller.(*Impl).Run.func2\n\t/home/prow/go/src/knative.dev/eventing/vendor/knative.dev/pkg/controller/controller.go:343"
}

Expected behavior

before the configmappropagations work, this worked ;-)

/cc @grac3gao
/cc @grantr

[grac3gao-zz]

I added configmappropagations/finalizers in #2646 . After it get merged, could you try again to see if it solves this openshift issue?