title: Maven duplicated jar in repository
body: <p>I am getting a duplicated class error because of duplicated jars in my repository.
  Jars are coming with an open source Apache project's sub module's pom, project is <code>James</code>, sub module is <code>container-spring</code>.</p>
  
  <p>Here is pom.xml in root of James:</p>
  
  <p><a href="http://svn.apache.org/repos/asf/james/server/tags/james-server-3.0-beta4/pom.xml" rel="nofollow">http://svn.apache.org/repos/asf/james/server/tags/james-server-3.0-beta4/pom.xml</a></p>
  
  <p>Here is sub module container-spring's pom.xml:</p>
  
  <p><a href="http://svn.apache.org/repos/asf/james/server/tags/james-server-3.0-beta4/container-spring/pom.xml" rel="nofollow">http://svn.apache.org/repos/asf/james/server/tags/james-server-3.0-beta4/container-spring/pom.xml</a></p>