Controller is missing patch event privileges

[jessesuen]

It seems rollout-controller also needs patch privileges on events.

E0523 07:06:00.421401       1 event.go:203] Server rejected event '&v1.Event{TypeMeta:v1.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:v1.ObjectMeta{Name:"rollouts-demo.15a13e031675200e", GenerateName:"", Namespace:"default", SelfLink:"", UID:"", ResourceVersion:"17258", Generation:0, CreationTimestamp:v1.Time{Time:time.Time{wall:0x0, ext:0, loc:(*time.Location)(nil)}}, DeletionTimestamp:(*v1.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string(nil), OwnerReferences:[]v1.OwnerReference(nil), Initializers:(*v1.Initializers)(nil), Finalizers:[]string(nil), ClusterName:""}, InvolvedObject:v1.ObjectReference{Kind:"Rollout", Namespace:"default", Name:"rollouts-demo", UID:"259e2a57-7d29-11e9-b280-0eb058d58717", APIVersion:"argoproj.io/v1alpha1", ResourceVersion:"17355", FieldPath:""}, Reason:"ScalingReplicaSet", Message:"Scaled up replica set rollouts-demo-7d95bc4d88 to 3", Source:v1.EventSource{Component:"rollouts-controller", Host:""}, FirstTimestamp:v1.Time{Time:time.Time{wall:0x0, ext:63694191929, loc:(*time.Location)(0x1e4f6e0)}}, LastTimestamp:v1.Time{Time:time.Time{wall:0xbf31af76186cff09, ext:347013080949, loc:(*time.Location)(0x1e4f6e0)}}, Count:2, Type:"Normal", EventTime:v1.MicroTime{Time:time.Time{wall:0x0, ext:0, loc:(*time.Location)(nil)}}, Series:(*v1.EventSeries)(nil), Action:"", Related:(*v1.ObjectReference)(nil), ReportingController:"", ReportingInstance:""}': 'events "rollouts-demo.15a13e031675200e" is forbidden: User "system:serviceaccount:argo-rollouts:argo-rollouts" cannot patch resource "events" in API group "" in the namespace "default"' (will not retry!)