Allow the Location Import to recognize/process multiple national distributors per individual location

The locations import currently only handles a single national distributor per location. As Chick-fil-A continues to grow and expand, there is a business need for multiple national distributors to service a single Restaurant. This enhancement should allow for a one-to-many pairing of Restaurant to national distributors. The location file will simply have additional "distributor" attributes listed sequentially. Each distributor attribute should be processed appropriately and be assigned to the location and show up in the Ordering dropdown and other screens that require Distributor selection.

See screenshot below, as well as a mocked-up file with just 01919 and a number of distributors assigned in the file:
Locations_all_with_multiple_distributors.xml

Note: Occasionally there will be multiple distribution centers that are part of the same distributor. In this case, since InFORM just places an order with head office of Distributor, the multiple “distributor” assignments should not cause “MBM” to show up in the dropdown twice. See screenshot below: