PythonScript.py: Delete _params if it's an empty string, to avoid NoneType parameters from generating.

testERP5Security.py: avoid test from deleting workflow module by error, add erp5workflow method compability.

erp5_base: change delete transition name in erp5_workflow to avoid comflit with transition has the same name in DCworkflow used by the same portal type.

erp5_property_sheets: add managed_permission_property to fix permission_role matrix generation error.

Workflow.py: clean Permission Role list after Role mapping; Transition.py: Remapping roles after changing state.

erp5_property_sheets: add is_selected_property in State, which is related to permission role matrix checkbox.

erp5_workflow: add portal_types: PermissionRoles and it's view. Add PermissionRoles as allowed content of State.