Plugin Interface should be provide JobScheduler email settings

The following email settings (factory.ini) should be provided by JobScheduler plugin interface:

• mail_on_error
• mail_on_warning

• log_mail_from
• log_mail_to
• log_mail_cc
• log_mail_bcc

• smtp
• mail.smtp.user
• mail.smtp.password
• mail.smtp.port
• mail_queue_dir