erp5_workflow: change Interaction/Transition/Variable's Properties 'group, permission' type to lines, so does the views of this two fields.

Workflow.py: skip getTypeWorkflow if Type is none. This correction corresponds to the worklist generation.

testERP5NamingConvention.py: replace erp5_workflo_test_data with erp5_workflow_test in the list of business templates for this test.

replace the old templates.

patches/Expression.py: cleanup this file, rename method createExprContext and redeploy this method in workflow.

workflow_test_data: fix module and document security parameters; fix the testing worklist's matched type.

erp5_workflow: change the group property and permission property type to lines; accordingly change these 2 properties' view in Worklist view.

ERP5Site.py: check the action provider list after the workfkow tool migration, add portal_workflow if it was not in the list; clean up.

erp5_workflow_test_data: check woerkflow history with expected contents dict to make sure the history contents are correct.

InteractionWorkflow.py: in showAsXML deploy expression getter; turn property_value into empty string when it is an empty tuple.

ERP5/InteractionWorkflow.py: get interaction guard expression text instead of callable object in showAsXML.

patches/DCWorkflow.py: get transition guard expression text instead of callable object in showAsXML.

deal with empty transition guard expression in conversion.