Suppress error when stopping during filterlist update

intel/filterlists/updater.go

@@ -24,6 +24,11 @@ var updateInProgress = abool.New()
 func tryListUpdate(ctx context.Context) error {
 	err := performUpdate(ctx)
 	if err != nil {
+		// Check if we are shutting down.
+		if module.IsStopping() {
+			return nil
+		}
+
 		// Check if the module already has a failure status set. If not, set a
 		// generic one with the returned error.
 		failureStatus, _, _ := module.FailureStatus()