Fix ticker memory leak in bulk indexer due to internal flush call res…

…etting the ticker. (#797) (#798)

Co-authored-by: Tony Blyler <tblyler@users.noreply.github.com>

esutil/bulk_indexer.go

@@ -402,8 +402,8 @@ func (w *worker) run() {
 			w.bi.config.DebugLogger.Printf("[worker-%03d] Started\n", w.id)
 		}
 		defer func() {
-			w.ticker.Stop()
 			w.flush(ctx)
+			w.ticker.Stop()
 			w.bi.wg.Done()
 		}()