Failed to create "AWSOriginRequestPolicy" resource. Resource handler returned message: "Invalid request provided: AWS::CloudFront::OriginRequestPolicy: Another origin request policy with the same name already exists within the aws account.

[aleclarson]

If you change the region of a @saus/cloudformation stack, it will try creating a request policy that already exists. This is because the deploy target's cache key is tied to the region, but the request policy is global. To fix this, we should give request policies (and other global CloudFormation resources) their own cache key.