use protobuf content type instead of json for k8s client (#468)

Author: bhavi-koduru

main.go

@@ -205,6 +205,8 @@ func main() {
 	kubeConfig.QPS = config.DefaultAPIServerQPS
 	kubeConfig.Burst = config.DefaultAPIServerBurst
 	kubeConfig.UserAgent = fmt.Sprintf("%s/%s", ec2API.AppName, version.GitVersion)
+	kubeConfig.AcceptContentTypes = "application/vnd.kubernetes.protobuf,application/json"
+	kubeConfig.ContentType = "application/vnd.kubernetes.protobuf"
 
 	setupLog.Info("starting the controller with leadership setting",
 		"leader mode enabled", enableLeaderElection,