Changes for OVPMS-1526 Stock location preferred suppliers

git-svn-id: svn://svn.openvpms.org/openvpms/archetypes/trunk@6223 9e4fa352-aafb-0310-9071-df624684024b
Fix for OVPMS-1527 Generate Orders generates multiple order items if a product and supplier has 2 or more preferred relationships

git-svn-id: svn://svn.openvpms.org/openvpms/archetypes/trunk@6232 9e4fa352-aafb-0310-9071-df624684024b