The roundrobin test was failing on slow machines because the prefetch size was too small so the round robined

distribution was not equals since the slow consumer's prefetch window would fill up and other consumers would
unevenly get more messages.

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@365537 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/test/java/org/apache/activemq/broker/QueueSubscriptionTest.java

@@ -119,7 +119,7 @@ public class QueueSubscriptionTest extends JmsMultipleClientsTestSupport {
         producerCount = 50;
         messageCount  = 100;
         messageSize   = 1; // 1 byte
-        prefetchCount = 10;
+        prefetchCount = 100;
 
         doMultipleClientsTest();