Turning on TCP NODELAY in the Simple Consumer.

See also:
apache/kafka@2a59ad7

src/main/java/com/sohu/jafka/consumer/SimpleConsumer.java

@@ -86,6 +86,7 @@ private SocketChannel connect() throws IOException {
         ch.socket().setReceiveBufferSize(bufferSize);
         ch.socket().setSoTimeout(soTimeout);
         ch.socket().setKeepAlive(true);
+        ch.socket().setTcpNoDelay(true);
         ch.connect(address);
         return ch;
     }