Resolve "Parcel template column name"

Closes #819 (closed)

• add name in the header when the headers are duplicated, so users have an indication of which header it is.
• ensure it is consitent with the import
• ensure it's the same for csv and excel

For example for MX:

added Logistics label

assigned to @bodin

changed the description

requested review from @demariaa

approved this merge request

merged

mentioned in commit fe041533