Shutdown jsExecutor after Nashorn destroy

common/script/script-api/src/main/java/org/thingsboard/script/api/js/NashornJsInvokeService.java

@@ -127,6 +127,9 @@ public class NashornJsInvokeService extends AbstractJsInvokeService {
         if (monitorExecutorService != null) {
             monitorExecutorService.shutdownNow();
         }
+        if (jsExecutor != null) {
+            jsExecutor.shutdownNow();
+        }
     }
 
     @Override