WorkflowTool.py: in asERP5Object only check old workflow types, because in test conflict, it crashed by something else?

erp5_core: ERP5Site_updateTranslationTable speed up by replacing accesors with variable as much as possible.

WorkflowTool.py: only convert DCWorkflow and DC interaction workflow, this modification makes conversion more robust.

WorkflowTool.py: during conversion, Guard's expression keep none if old guard didn't have expression.

ERP%TypeTestCase.py: in dynamicalWorkflowConversion, no more convert workflow livetest related workflows.

Worklist.py: make getVarMatchKey return sub-dynamic-variable reference to fix fmt_data wrong variable key error.

WorkflowTool.py: convertt dynamic variable during worklist conversion if need; check new dynamic variable value by using it's reference.

Workflow.py: use CachinMethod to execute getPortalTypeListForWorkflow; now this part keeps indentical to the DCWorkflow.py.