We create hundreds of AWS Elasticsearch resources over the last few months and we get occasional timeout failures from AWS. This will PR is to increase the timeout once again. I did it before:
https://github.com/hashicorp/terraform/pull/5910/files
But we've seen enough timeouts from AWS on this resource that increasing the timeout seems like the only solution.
Change the `RetryFunc` from a plain `error` return type to a
specialized `RetryError` which must decide whether it is
retryable or not.
Add `RetryableError` / `NonRetryableError` factory functions that
callers are meant to use to build up these errors.
This makes it eminently clear whether or not a given error is
retryable from inside the client code.
Goal here is to _not_ change any behavior, simply reflect the
existing behavior with the new, clearer, API.