resolve AMQ-2210|https://issues.apache.org/activemq/browse/AMQ-2210, in hindsight, it does not make sense to wait for dispatch in anycase as the message will always get replayed at some stage. an un dispatched ack is expected in this case so it is correct to ignore it. Revert wait from AMQ-2149|https://issues.apache.org/activemq/browse/AMQ-2149
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/PrefetchSubscription.java