kafka-1424; (followup patch) transient unit test failure in testSendWithDeadBroker; patched by Jun Rao; reviewed by Guozhang Wang and Neha Narkhede
kafka-1383; transient unit test failure in SocketServerTest; patched by Jun Rao; reviewed by Guozhang Wang and Neha Narkhede
KAFKA-1428 Ensure we close the file handle when reading the config.