Mask bearer token in logs when logLevel >= 9

Kubernetes-commit: f5bf592fc0d60fe2f135bcea30a61b7ee6d8f2b9

Author: sfowl

transport/round_trippers.go

@@ -340,6 +340,7 @@ func (r *requestInfo) toCurl() string {
 	headers := ""
 	for key, values := range r.RequestHeaders {
 		for _, value := range values {
+			value = maskValue(key, value)
 			headers += fmt.Sprintf(` -H %q`, fmt.Sprintf("%s: %s", key, value))
 		}
 	}