In preparations for personalization over REST, we need to refactor JcrDeliveryEndpoint a little bit.

We need to:

• Expose JcrDeliveryEndpointDefinition so that request/response filters may access it and act accordingly on the setup configured on the definition level
• Set priority for request/response filters - especially needed for setting priority
  • priority will ensure node wrappers are applied in order we need
• Refactor (and deprecate) ReferenceContext to be part of the more global one, which will also carry the endpoint definition