Add a hiera lookup to resolve the DB password for the apps::service_manual_publisher class
Add a hiera lookup to resolve the DB password for the apps::service_manual_publisher class

This was broken in PR 3806 and began to surface as the class is now included when running the node tests.

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