oups fix version

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1544404 13f79535-47bb-0310-9956-ffa450edef68
use last ehcache 2.7.4

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1544405 13f79535-47bb-0310-9956-ffa450edef68