There are response headers that overlap in all services which can be handled at the level of the gateway and also response headers specific to the application/service which can be handled at the application/service level.
The goal of this task is to come up with a requirement for the gateway as to what response headers it should handle so that the rest will be handled at the level of the service itself.
== Acceptance criteria ==
[ ] Go through services inside RB to figure out which response headers can happen at the gateway level
[ ] The rest of the response headers should remain in the application/service layer
[ ] All services should use the gateway level response headers and code should be updated to delete what is already happening at the gateway layer
[ ] Test per service to ensure that response headers are still working as before.
[ ] Clients should not notice any change in behavior as the response headers are expected to be returned the same.