uboness 5df9c048fe 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)
2014-09-05 16:54:46 +02:00
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