ERP5Site.py: remove workflow tool migration in site setup, because now it will install erp5 workflow tool instead of DCWorkflow tool.

Workflow.py: remove non necessary code in notifyCreated; fix _executeTransition when non transition pass to it as a parameter.

InteractionWorkflow.py: remove duplicated code, function correction according to erp5 workflow structure.

g to erp5 workflow structure.

This reverts commit ea00f588.

Revert "patches/DCWorkflow.py: when generate xml file, verfie the existence of the object, if an object id is bad defined, don't put it in XML."

This reverts commit aac83e25.

patches/DCWorkflow.py: when generate xml file, verfie the existence of the object, if an object id is bad defined, don't put it in XML.

Workflow.py: do not compare title in showAsXML, because in some case DC workflow's transition/ingeraction or state doesn't has title.

InteractionWorkflow.py: do not compare title in showAsXML, because in some case DC workflow's transition/ingeraction or state doesn't has title.

patches/DCWorkflow.py: do not compare title in showAsXML, because in some case DC workflow's transition/ingeraction or state doesn't has title.

WorkflowTool.py: during the workflow convertion, if DC workflow's transition/interaction or state doesn't have a title, then converted its id as title.

ERP5/InteractionWorkflow.py: do not compare object title in showAsXML, because in some DC workflow, transition, state or interaction do not have any title.

Workflow.py: In a transition, if we use '%(content_url)s/Base_viewWorkflowActionDialog?workflow_action=%(transition_id)s' in field 'Display in Action Box URL', it will return the reference of transition instead of its id.

WorkflowTool.py: remove default variables and state added by pre configuration script before convertion.

erp5_workflow: add workflow initialize script, remove create pre-configured workflow action from workflow tool.