Feature: Add configuration to limits reading events to a specific namespace

[mavanier]

/kind feature

What happened: Unable to specified a specific namespace to read events from

What you expected to happen:
In our cluster, we do not have the rights to see all cluster resources. By starting the application, we get the following exception.

E0421 17:03:18.033794       1 reflector.go:153] k8s.io/client-go/informers/factory.go:135: Failed to list *v1.Event: events is forbidden: User "system:serviceaccount:dev:event-exporter" cannot list resource "events" in API group "" at the cluster scope

How to reproduce it (as minimally and precisely as possible):

• Create a new namespace
• Create a new ServiceAccount in that namespace
• Create a new RoleBinding to view clusterRole.
• Bind the pod to the namespaced service account
• Should see errors

Anything else we need to know?:
I tried installing it on OpenShift in a newly created namespace/project.