Add more time to workers to finish executions

src/main/java/fr/ntr/Main.java

@@ -105,7 +105,7 @@ public class Main {
             }
             executor.shutdown();
             try {
-                executor.awaitTermination(2, TimeUnit.MINUTES);
+                executor.awaitTermination(5, TimeUnit.MINUTES);
             }
             catch (InterruptedException e) {
                 e.printStackTrace();