sweepbatcher: close the quit channel when the batcher is shutting down

Author: bhandras

sweepbatcher/sweep_batcher.go

@@ -216,6 +216,7 @@ func (b *Batcher) Run(ctx context.Context) error {
 	runCtx, cancel := context.WithCancel(ctx)
 	defer func() {
 		cancel()
+		close(b.quit)
 
 		for _, batch := range b.batches {
 			batch.Wait()