Generate automaticaly "not like" operator use in KeywordKey when given operator is "!=" and value contains at least one "%".
Update test to chekc for "not like" operator.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25817 20353a03-c40f-0410-a6d1-a30d3c3de9de