RDS notification not recognized

[avram]

We just got one of these-- would be good to teach the webhook about this message type.

RDS Notification Message: Unrecognized SNS message {"Event Source":"db-instance","Event Time":"2014-12-13 23:03:46.382","Identifier Link":"https://console.aws.amazon.com/rds/home?region=us-east-1#\nSourceId: delayedqueue ","Event ID":"http://docs.amazonwebservices.com/AmazonRDS/latest/UserGuide/USER_Events.html#RDS-EVENT-0049 ","Event Message":"Multi-AZ instance failover completed"}