Add clamav.pp manifest to control ClamAV scanning
Add clamav.pp manifest to control ClamAV scanning

This commit adds a manifest (clamav.pp) to Puppet in order to control ClamAV.
The manifest itself does not directly run ClamAV, but rather it contains a cron
type to run a shell script at a random number of minutes (between 0 and 60) past
every hour.

alphagov/govuk_offsitebackups-puppet,alphagov/govuk_offsitebackups-puppet