Removed 'MAILTO' and 'MAILFROM' settings from crontab templates.
These cause the crontab to fail to load on Ubuntu systems, resulting
in this (rather confusing) error:
"/tmp/cf3":0: bad minute
errors in crontab file, can't install.
The individual SDP scripts set MAILTO and MAILFROM in the scripts,
so having these set wasn't necessary in any case.