Fix buffer leaks in Bzip2DecoderTest

codec/src/test/java/io/netty/handler/codec/compression/Bzip2DecoderTest.java

@@ -186,9 +186,11 @@ public class Bzip2DecoderTest {
             ByteBuf msg;
             while ((msg = channel.readInbound()) != null) {
                 uncompressed.writeBytes(msg);
+                msg.release();
             }
             final byte[] result = new byte[uncompressed.readableBytes()];
             uncompressed.readBytes(result);
+            uncompressed.release();
 
             assertArrayEquals(data, result);
         }