Create migration script for setting in all orders "reEncumber" = true

Purpose/Overview:
There is a flag ""Re-Encumbered" for order. When rollover encumbrances this flag must be analyzed

Requirements/Scope:

1. By default all created encumbrances must be rollovered.
2. ramls/acq-models/mod-orders-storage/schemas/purchase_order.json
   replace "reEncumber" default value from "false" to "true"

Approach:
Prepare migration script

Acceptance criteria:

• Script created and tested