netty#7285 Improved "Discarded inbound message" warning for embedded …

…channel (netty#9414)

Motivation:

Look like `EmbeddedChannelPipeline` should also override `onUnhandledInboundMessage(ChannelHandlerContext ctx, Object msg)` in order to do not print "Discarded message pipeline" because in case of `EmbeddedChannelPipeline` discarding actually not happens.

This fixes next warning in the latest netty version with websocket and `WebSocketServerCompressionHandler`:

```
13:36:36.231 DEBUG- Decoding WebSocket Frame opCode=2
13:36:36.231 DEBUG- Decoding WebSocket Frame length=5
13:36:36.231 DEBUG- Discarded message pipeline : [JdkZlibDecoder#0, DefaultChannelPipeline$TailContext#0]. Channel : [id: 0xembedded, L:embedded - R:embedded].
```

Modification:

Override correct method

Result:
Follow up fix after netty#9286

transport/src/main/java/io/netty/channel/embedded/EmbeddedChannel.java

@@ -26,6 +26,7 @@
 import io.netty.channel.ChannelFuture;
 import io.netty.channel.ChannelFutureListener;
 import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelId;
 import io.netty.channel.ChannelInitializer;
 import io.netty.channel.ChannelMetadata;
@@ -873,8 +874,8 @@ protected void onUnhandledInboundException(Throwable cause) {
         }
 
         @Override
-        protected void onUnhandledInboundMessage(Object msg) {
-          handleInboundMessage(msg);
+        protected void onUnhandledInboundMessage(ChannelHandlerContext ctx, Object msg) {
+            handleInboundMessage(msg);
         }
     }
 }