Add permission to create events

Updates Controller RBAC to allow creation of events.

Change-Id: Id0378d214e483428f7e3a616f4f6304093ed8b16

devstack/lib/kuryr_kubernetes

@@ -431,6 +431,11 @@ rules:
   - network-attachment-definitions
   verbs:
   - get
+- apiGroups: ["", "events.k8s.io"]
+  resources:
+  - events
+  verbs:
+  - create
 ---
 kind: ClusterRoleBinding
 apiVersion: rbac.authorization.k8s.io/v1