Expose a new column Lineitem name from Employee_Paycheckdata table. This column will be shown on fields mapping screen. This will be a non DTS column.
If this column is mapped in template, must have value in file other wise will be kicked out.

Idea behind this column is to reduce size of file and import template.
WARNING: In current paycheck import logic, Employee, line item and paycheck effective date forms a unique key. This implementation is going to be continue. line item name must be marked as unique field. Other wise it will create data overriding issue

Please note: this should be a temporary code change, we should not continue this in long run