Fix missed TIMEOUT_DURATION replacement in tests

Author: jbern0rd

src/test/java/com/iexec/blockchain/tool/QueueServiceTests.java

@@ -137,7 +137,7 @@ void shouldExecuteInOrder() throws NoSuchFieldException {
 
         Awaitility
                 .await()
-                .atMost(5, TimeUnit.SECONDS)
+                .atMost(TIMEOUT_DURATION, TimeUnit.SECONDS)
                 .until(() -> executionOrder.size() == totalTasksNumber);
 
         // Tasks should have been executed in the right order.