[#2494] Fix data curruption by ChannelTrafficShapingHandler

Motivation:
ChannelTrafficShapingHandler may corrupt inbound data stream by
scheduling the fireChannelRead event.

Modification:
Always call fireChannelRead(...) and only suspend reads after it

Result:
No more data corruption

handler/src/main/java/io/netty/handler/traffic/AbstractTrafficShapingHandler.java

@@ -245,17 +245,6 @@ public abstract class AbstractTrafficShapingHandler extends ChannelDuplexHandler
                     }
                     ctx.executor().schedule(reopenTask, wait,
                             TimeUnit.MILLISECONDS);
-                } else {
-                    // Create a Runnable to update the next handler in the chain. If one was create before it will
-                    // just be reused to limit object creation
-                    Runnable bufferUpdateTask = new Runnable() {
-                        @Override
-                        public void run() {
-                            ctx.fireChannelRead(msg);
-                        }
-                    };
-                    ctx.executor().schedule(bufferUpdateTask, wait, TimeUnit.MILLISECONDS);
-                    return;
                 }
             }
         }