Move rkhunter passive check into cron.daily
Move rkhunter passive check into cron.daily

Instead of running this check as a cron resource, we should move
the file into cron.daily where the time it executes can be managed
centrally.

This is useful for preview where we switch off the environment overnight.

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