One problem I perceive with the current `FlightGetInfo` message is that the 
schema is included, and it could be large e.g. if there are large dictionaries. 

We might consider having the result of `ListFlights` return a message that does 
not include the schema and get the schema some other way. The schema probably 
should be transported in `FlightData` so it can be handled through the 
zero-copy read path

[ Full content available at: https://github.com/apache/arrow/pull/2102 ]
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