HA queues are a little slower.

Author: Simon MacMullen

test/src/com/rabbitmq/client/test/functional/DeadLetterExchange.java

@@ -382,7 +382,7 @@ private void sleep(long millis) {
        publication time + TTL + latency */
     private void checkPromptArrival(QueueingConsumer c,
                                     int count, long latency) throws Exception {
-        long epsilon = TTL / 100;
+        long epsilon = TTL / 50;
         for (int i = 0; i < count; i++) {
             Delivery d = c.nextDelivery(TTL + TTL + latency + epsilon);
             assertNotNull("message #" + i + " did not expire", d);