Update NotificationRequest resource for R3 capabilities
Use Enum suffix for enums, simplify agg_type tp type, single email per notification
typo
 allow multiple DeliveryConfigs per NotificationRequest and other refinements
typo
mod delivery_configuration to delivery_configurations as it is a list
Merge pull request #564 from MauriceManning/uns_rebase

CIDEVSTC-80 Design user notification service extension behavior model