


If the Freight Bill is a potential Duplicate, it returns a collection
[DUP_SIGN, DUP_FB_ID, DUP_BAT_ID] identifying the potential Duplicate Freight Bills.
Looks for potential duplicates with signatures of both <Shipment_Date>,
<FB_KEY>. Also where the potential duplicate may not have the <Shipment_Date>
provided.
Collection_Dup_Signature_Create