ERP5Workflow: erp5_configurator_*: Migrate Configurator Workflows from workflow_module to portal_workflow (!1378).

Migration Procedure: With your current instance:
  1. Update erp5.git
  2. Start your instance.
  3. Upgrade erp5_property_sheets, erp5_core and erp5_configurator bt5s.
  4. Add an External Method for the module migrateWorkflowModuleToPortalWorkflow and the function of the same name as the module.
  5. Run the External Method to convert them from workflow_module to portal_workflow.
  6. Move all workflow_module from PathTemplateItem of your Business Template to Workflows and commit.