[FlightRPC] [Java] Integration test client doesn't close buffers #22386
Description
The integration test client doesn't close any of the clients or free any of the buffers it creates.
Trying to do so leads to a leak problem on the dictionary vector case.
Reporter: David Li / @lidavidm
Assignee: David Li / @lidavidm
PRs and other links:
Note: This issue was originally created as ARROW-5978. Please see the migration documentation for further details.