[#57374304] 
Setting "System" account to use for all background jobs.
1. Security context for Quartz cron jobs - this is done.
2. Updating with a proper email template - using Freemarker rather than Velocity.
3. Getting the right Volunteer (volunteer overseer) to set the email address to. Still to do.
4. Adding attachments to email including setting the file type. Still to do.