Fix incomplete rerouting of publishing-api requests
Fix incomplete rerouting of publishing-api requests

This was missed from: bae64dcdfcbf8a61e622c6bc4933d6dcc6222a37

Before this commit, we think requests for publishing-api will be randomly
routed requests to either api-lb machines (content-store) or backend-lb
machines (publishing-api).

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet