@After
  public void tearDown() throws IOException {
    ((org.apache.logging.log4j.core.Logger) org.apache.logging.log4j.LogManager
      .getLogger(BufferCallBeforeInitHandler.class)).removeAppender(mockAppender);
    Closeables.close(client, true);
    Closeables.close(server, true);
  }
A simple UT to make sure that we do not leak the SslExceptions to netty's TailContext, where it
will generate a confusing WARN message.
<p>
See HBASE-27782 for more details.
hbase-client/src/test/java/org/apache/hadoop/hbase/ipc/TestTLSHandshadeFailure.java