Test that all included users have manifests
Test that all included users have manifests

This is to make the task of removing users who have left easier. Instead of
having ensure absent, we should just remove their manifest and remove it from
any groups that include them.

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