move to cassandra 2.0
compress huge string in cassandra

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1542899 13f79535-47bb-0310-9956-ffa450edef68
add new classes

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1542900 13f79535-47bb-0310-9956-ffa450edef68