FEAT #13679 TIME 3 continue refactoring notification scripts

install/class/Class_Install.php

install/scripts/testSmtp.php

migration/20.10/2010.sql

modules/notifications/batch/basket_event_stack.php

modules/notifications/batch/config/config.xml.default

modules/notifications/batch/load_process_email_stack.php

modules/notifications/batch/load_process_event_stack.php

modules/notifications/batch/load_stack_letterbox_alerts.php

modules/notifications/batch/process_email_stack.php

modules/notifications/batch/process_event_stack.php

modules/notifications/class/events_controler_Abstract.php

modules/notifications/xml/diffusion_type.xml

sql/structure.sql

src/app/notification/models/NotificationsEmailsModel.php