ERP5Workflow: compute correctly the transition id

In case of workflow being a DCWorkflow (from wf_id or workflow_list),
we should get the transition id according to the old DC workflow
transition ids (ex: plan_action and not transition_plan_action).

product/ERP5Workflow/Tool/WorkflowTool.py

@@ -193,26 +193,24 @@ class WorkflowTool(BaseTool, OriginalWorkflowTool):
                   wf_id=None, *args, **kw):
     workflow_id = wf_id
     workflow_list = self.getWorkflowsFor(current_object.getPortalType())
-    action_id = action_reference
+    action_id = ''
     if workflow_id is None:
       if workflow_list == []:
         raise WorkflowException(_(u'No workflows found.'))
       found = 0
       for workflow in workflow_list:
-        if workflow.getPortalType() == 'Workflow':
-          action_id = workflow.getTransitionIdByReference(action_reference)
+        action_id = workflow.getTransitionIdByReference(action_reference)
         if workflow.isActionSupported(current_object, action_id, **kw):
           found = 1
           break
       if not found:
-        message = "No workflow provides the %s action." % action_id
+        message = "No workflow provides the %s action." % action_reference
         raise WorkflowException(message)
     else:
       workflow = self.getWorkflowById(workflow_id)
       if workflow is None:
-        raise WorkflowException(_(u'Requested workflow definition not found.'))
-      if workflow.getPortalType() == 'Workflow':
-        action_id = workflow.getTransitionIdByReference(action_reference)
+        raise WorkflowException(_(u'Requested workflow not found.'))
+      action_id = workflow.getTransitionIdByReference(action_reference)
     result = workflow.doActionFor(current_object, action_id, **kw)
     return result