Add DeleteAutomatedBackups to RDS DBInstance (#1263)
Add DeleteAutomatedBackups to RDS DBInstance (#1263)

This was part of the Nov. 19 update:

> Use the DeleteAutomatedBackups property to indicate whether automated backups
> should be deleted (true) or retained (false) when you delete a DB instance.
> The default is true.
ikben/troposphere,ikben/troposphere,cloudtools/troposphere,johnctitus/troposphere,johnctitus/troposphere,cloudtools/troposphere