dd-177 add behat step to check headers and assert file is forced to be downloaded (used for report)
dd-177 add behat step to check headers and assert file is forced to be downloaded (used for report)

ministryofjustice/opg-digi-deps-client,ministryofjustice/opg-digi-deps-client,ministryofjustice/opg-digi-deps-client,ministryofjustice/opg-digi-deps-client