Changes for OVPMS-1484 Product batch management

git-svn-id: svn://svn.openvpms.org/openvpms/archetypes/branches/1.8-dev@5982 9e4fa352-aafb-0310-9071-df624684024b
Changes for OVPMS-1484 Product batch management

git-svn-id: svn://svn.openvpms.org/openvpms/archetypes/branches/1.8-dev@5984 9e4fa352-aafb-0310-9071-df624684024b