Update purchase order number pattern

Overview

The currenty minimum number of digits for the PO number (5) is preventing users from migrating orders from other systems.

Approach

• Change the purchase_order.poNumber pattern from

  ^[a-zA-Z0-9]{5,16}${code} to 

  ^[a-zA-Z0-9]

  {1,16}${code}
  * Change the po_line.poLineNumber pattern from

  ^[a-zA-Z0-9]{5,16}-[0-9]{1,3}${code} to 

  ^[a-zA-Z0-9]{1,16}

  -[0-9]

  {1,3}

  ${code}

Acceptance criteria

• schemas have been updated (don't forget about the composite schemas)
• adjust sample data so that at least one order has a shorter poNumber/polNumber