Honour RAILS_LOG_TO_STDOUT for GdsApi client logs.
Honour RAILS_LOG_TO_STDOUT for GdsApi client logs.

All of our logs need to go to stdout/stderr when running on k8s.

We no longer set up a custom logger for GdsApi client logs. This brings
the app into line with the others and makes it behave correctly with
regard to RAILS_LOG_TO_STDOUT.

alphagov/publisher,alphagov/publisher,alphagov/publisher