Add unit tests for session timeout http headers
Add unit tests for session timeout http headers

These tests check for the absence or presence
of the session timeout redirect headers.

[MAPDEV326]

ministryofjustice/manchester_traffic_offences_pleas,ministryofjustice/manchester_traffic_offences_pleas,ministryofjustice/manchester_traffic_offences_pleas,ministryofjustice/manchester_traffic_offences_pleas