This commit switches out the use of `fmt.Errorf` to `errwrap.Wrapf` in
the `aws_autoscaling_lifecycle_hook` resource, and corrects a typo which
causes the parameter object to be returned to a user rather than the
underlying error.
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.
James Nugent