changes for OVPMS-1533 Suppress caching of documents in ehcache.xml

git-svn-id: svn://svn.openvpms.org/openvpms/etl/branches/1.8-dev@6276 9e4fa352-aafb-0310-9071-df624684024b
Merge remote-tracking branch 'remotes/origin/1.8-Dev'