fix pom

git-svn-id: https://svn.apache.org/repos/asf/archiva/sandbox/trunk@1491401 13f79535-47bb-0310-9956-ffa450edef68
move cassandra version to a property

git-svn-id: https://svn.apache.org/repos/asf/archiva/sandbox/trunk@1491402 13f79535-47bb-0310-9956-ffa450edef68
remove non needed file

git-svn-id: https://svn.apache.org/repos/asf/archiva/sandbox/trunk@1491403 13f79535-47bb-0310-9956-ffa450edef68