LzmaFrameEncoderTest double release

Motivation:
2c78902ebc ensured buffers were released in the general case but didn't clean up an extra release in LzmaFrameEncoderTest#testCompressionOfBatchedFlowOfData which lead to a double release.

Modifications:
LzmaFrameEncoderTest#testCompressionOfBatchedFlowOfData should not explicitly release the buffer because decompress will release the buffer

Result:
No more reference count exception and failed test.

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

@@ -69,7 +69,6 @@ public class LzmaFrameEncoderTest extends AbstractEncoderTest {
         while ((msg = channel.readOutbound()) != null) {
             ByteBuf decompressedMsg = decompress(msg, originalLengths.get(i++));
             decompressed.addComponent(true, decompressedMsg);
-            msg.release();
         }
         assertEquals(originalLengths.size(), i);
         assertEquals(data, decompressed);