Bill import functionality broken - cannot import the default sample template file

[paladincorners]

If you go to import a bill, you are given the option to download a sample template file, either in CSV or XLSX format. If you then try to import that very same file, without modifications, then even though all the fields are mapped, you get this error:

1 |   | Vendor is a required field
1 |   | Item is a required field
3 |   | Vendor is a required field
3 |   | Item is a required field
2 |   | Vendor is a required field
2 |   | Item is a required field

Also, consider changing the sample template to show how to import bills with multiple line items.

[linear]

BIG-297 Bill import functionality broken - cannot import the default sample template file