Update CheckSerializationTag and check if serialization_tag blocks to validate the same tagged message and the message remains.
Split test_102_CheckSQLDictDoesNotDeleteDuplicatesBeforeExecution into two tests and covers new SQLDict behavior.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28739 20353a03-c40f-0410-a6d1-a30d3c3de9de