Implement batch processing for UNS to meet R3 scope. Aligns with updated notifications.yml.
 - supports multiple delivery configurations per NR
 - adds NR name to event summary in email
 - supports notification types: simple, platform, site and facility using outil
 - batch processing does not support digest DeliveryMode

aligns with https://github.com/ooici/ion-definitions/pull/564
Merge pull request #2070 from MauriceManning/unsbatch2_rebase

CIDEVSTC-84	 Implement notification delivery by rule