old_contents: from data_collection.management.commands import BaseHalaroseCsvImporter
  
  class Command(BaseHalaroseCsvImporter):
      council_id      = 'W06000024'
      addresses_name  = 'Merthyr_polling_station_export-2017-04-13.csv'
      stations_name   = 'Merthyr_polling_station_export-2017-04-13.csv'
      elections       = [
          'local.merthyr-tydfil.2017-05-04',
          'parl.2017-06-08'
      ]
      csv_encoding    = 'latin-1'
  
new_contents: from data_collection.management.commands import BaseHalaroseCsvImporter
  
  class Command(BaseHalaroseCsvImporter):
      council_id      = 'W06000024'
      addresses_name  = 'parl.2017-06-08/Version 1/Merthyr Tydfil polling_station_export-2017-05-25.csv'
      stations_name   = 'parl.2017-06-08/Version 1/Merthyr Tydfil polling_station_export-2017-05-25.csv'
      elections       = ['parl.2017-06-08']
      csv_encoding    = 'latin-1'
  
subject: update Merthyr import script for parl.2017-06-08 (closes #938)