Runtime informations of persistent orders are removed from database when scheduler is shutting down

If a <modify_order> is performed to a job-chain with orders_recoverable="yes"
the runtime information of the order are saved in a reord in table scheduler_orders.

Problem:
If the scheduler is schutting down this record is removed from the table scheduler_orders.

When the scheduler is rebooting a new record is created containing the data of the persistent order.
Previous changes are lost. E.g. when the order state was changed in JOC with "set order state".