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ARROW-5996: [Java] Avoid potential resource leak in flight service

1. In FlightService#doPutCustom, the flight stream must be closed, even if an exception is thrown during the call of responseObserver.onError
2. The exception occurred during the call to acceptPut should not be swallowed.

Closes #4916 from liyafan82/fly_0722_leak and squashes the following commits:

3af5ac905 <liyafan82>  Avoid resource leak in flight service

Authored-by: liyafan82 <fan_li_ya@foxmail.com>
Signed-off-by: Micah Kornfield <emkornfield@gmail.com>