Bug 6302: Separate AutoEmailPrimaryAdress and AutoEmailOpacUser

Bug 6302: Separate AutoEmailPrimaryAdress and AutoEmailOpacUser

AutoEmailPrimaryAddress is not only used for the patron account mails, but
also for overdues and other email notices to patrons.

This patch separates the system preferences in the system preference editor.

To test:
- Check Patrons tab shows both system preferences separated
- Check you can still change the settings

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Koustubha Kale <kmkale@anantcorp.com>
(cherry picked from commit a5a8d78f0d54acd7606477774d5e94cfcac66e9a)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>