* call getToolByName with portal_object to avoid acquisitions loockup
  * remove calls of clearConversionCache
  * follow naming convention res => result_list, ob => document


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@34880 20353a03-c40f-0410-a6d1-a30d3c3de9de