* separate out a request-scoped reconciler and finalizer manager to
  avoid leaking state between requests
* clean up and add better structure to logging
* separate out Pingdom check specific reconciliation logic into a
  reconciler with a more re-usable interface exposing idempotent methods
  and a better defined structure
* separate out finalizer (de-)registration into a finalizer manager;
  should be re-usable when adding support for other resources
* decouple finalizer handling logic from resource deletion