elasticsearch/elasticsearch — pull request #7610 by uboness (2014-09-05 10:04:34+00:00)
Title: Introduced a transient context to the rest request

Similar to the one in `TransportMessage`. Added the `ContextHolder` base class where both `TransportMessage` and `RestRequest` derive from

Now next to the known headers, the context is always copied over from the rest request to the transport request (when the injected client is used)