TB-75 Service shutdown added

@@ -34,6 +34,7 @@ import org.thingsboard.server.dao.timeseries.TimeseriesDao;
 import org.thingsboard.server.dao.util.SqlDao;
 
 import javax.annotation.Nullable;
+import javax.annotation.PreDestroy;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
@@ -262,4 +263,9 @@ public class JpaTimeseriesDao extends JpaAbstractDaoListeningExecutorService imp
         });
     }
 
+    @PreDestroy
+    void onDestroy() {
+        insertService.shutdown();
+    }
+
 }