vc/listener: Reduce log levels for less spam.

Change-Id: I60f6a0bf13e02c74f9e946ea2aac9b5b8d8bffa2
diff --git a/runtime/internal/rpc/stream/vc/listener.go b/runtime/internal/rpc/stream/vc/listener.go
index 7e2ed0f..820a3a0 100644
--- a/runtime/internal/rpc/stream/vc/listener.go
+++ b/runtime/internal/rpc/stream/vc/listener.go
@@ -32,7 +32,7 @@
 func (l *listener) Enqueue(f stream.Flow) error {
 	err := l.q.Put(f)
 	if err == upcqueue.ErrQueueIsClosed {
-		logger.Global().Infof("Listener closed: %p, %p", l, l.q)
+		logger.Global().VI(3).Infof("Listener closed: %p, %p", l, l.q)
 		return verror.New(stream.ErrBadState, nil, verror.New(errListenerClosed, nil))
 	}
 	return err
@@ -50,7 +50,7 @@
 }
 
 func (l *listener) Close() error {
-	logger.Global().Infof("Listener being closed: %p, %p", l, l.q)
+	logger.Global().VI(3).Infof("Listener being closed: %p, %p", l, l.q)
 	l.q.Close()
 	return nil
 }