Address code review

pkg/util/retryutil/retry_util.go

@@ -17,10 +17,10 @@ type Ticker struct {
 	ticker *time.Ticker
 }
 
-// Stop returns ticker.Stop
+// Stop is a convenience wrapper around ticker.Stop
 func (t *Ticker) Stop() { t.ticker.Stop() }
 
-// Tick returns ticker.C
+// Tick is a convenience wrapper around ticker.C
 func (t *Ticker) Tick() { <-t.ticker.C }
 
 // Retry is a wrapper around RetryWorker that provides a real RetryTicker