XMLExportImport.py: resolve the conflict of list/tuple type value can't be convert into text problem.

erp5_workflow_test_data: remove self.tic which may crash test; edit portal type's workflow_list directly to not trigger workfow methods at the early stage of test.

erp5_workflow_test_data: keep DC testing workflow identical as origin_testing_workflow; fix converted workflow assignment in live test.

erp5_workflow_test_data: rename the user created testing workflows to avoid conflict in conversion live test.