Switching to Java 5.. Build and Runtime now require Java 5 see: http://www.nabble.com/Switching-to-ActiveMQ-4.2-to-Java-5----tf2637427.html
- Update maven build
- Removed dependency on concurrent-backport



git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/activeio/trunk@476005 13f79535-47bb-0310-9956-ffa450edef68