Merge pull request #45218 from NickrenREN/fed-useragent

Automatic merge from submit-queue

Keep UserAgentName style consistent

Keep using UserAgentName for controllers  and add some logs for debugging

**Release note**:

```release-note
NONE
```

federation/pkg/federation-controller/namespace/namespace_controller.go

@@ -47,6 +47,7 @@ import (
 const (
 	allClustersKey = "ALL_CLUSTERS"
 	ControllerName = "namespaces"
+	UserAgentName  = "federation-namespace-controller"
 )
 
 var (
@@ -96,7 +97,7 @@ type NamespaceController struct {
 func NewNamespaceController(client federationclientset.Interface, dynamicClientPool dynamic.ClientPool) *NamespaceController {
 	broadcaster := record.NewBroadcaster()
 	broadcaster.StartRecordingToSink(eventsink.NewFederatedEventSink(client))
-	recorder := broadcaster.NewRecorder(api.Scheme, clientv1.EventSource{Component: "federated-namespace-controller"})
+	recorder := broadcaster.NewRecorder(api.Scheme, clientv1.EventSource{Component: UserAgentName})
 
 	nc := &NamespaceController{
 		federatedApiClient:    client,