Add java client DoPut support. Fixes #1124.

[devinrsmith]

The end-user interface looks like:

try (
    final TableHandle sourceHandle = flight.session().execute(table());
    final FlightStream doGet = flight.stream(sourceHandle);
    final TableHandle destHandle = flight.put(doGet)) {
  // Use your destHandle now!
}

[nbauernfeind]

LGTM