Major Description
The goal is implement the GetObject endpoint for the S3 Gateway:
There reference doc is here:
https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
This is mostly just a simple stream copy between the OzoneClient and the output, but we also need to:
1. support rest-response-* headers
2. Support Range headers (Jetty may support it out-of the box)
(This jira is marked as newbie as it requires only basic Ozone knowledge. If somebody interested I can be more specific).