Added a test that shows using virtual topics in a network of brokers to resolve some of the pain that comes up with durable subscriptions across a network. This test demonstrates the use of Virtual Topics and ConditionalNetworkBridgeFilterFactory with replayWhenNoConsumers=true

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1445772 13f79535-47bb-0310-9956-ffa450edef68