fix compilation

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1539900 13f79535-47bb-0310-9956-ffa450edef68
fix compilation with using new jackson package

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1539901 13f79535-47bb-0310-9956-ffa450edef68
enforce version of jackson for cassandra module

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1539902 13f79535-47bb-0310-9956-ffa450edef68