Complete createServicePolicy

This commit is a continuation of a previous commit which added a utility
function for use in service classes which ensures that they follow the
circuit breaker and retry patterns.

This commit completes the function by adding:

- `retryFilterPolicy`, which allows for retrying certain errors and
  not handling others.
- `maxRetries`, which allows for giving up early before the max
  consecutive failures is reached. Note that because this can combine
  with `maxConsecutiveFailures`, it adds a bunch of other code paths
  and so this requires adding a lot of new tests.