record mailing lists in Cassandra

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1581252 13f79535-47bb-0310-9956-ffa450edef68
fix unit tests

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1581253 13f79535-47bb-0310-9956-ffa450edef68