Issue eclipse-ee4j#2016 Removed second deflator lock.

Signed-off-by: Matt Gill <matthew.gill@live.co.uk>
Signed-off-by: David Matějček <dmatej@seznam.cz>

modules/http2/src/main/java/org/glassfish/grizzly/http2/DefaultOutputSink.java

@@ -221,10 +221,6 @@ public void onPeerWindowUpdate(final int delta) throws Http2StreamException {
                 break;
             }
         }
-
-        if (outputQueue.peek() != null && outputQueue.peek().trailer != null) {
-            LOGGER.warning("Trailer frame is going to get ignored.");
-        }
     }
 
     /**
@@ -409,7 +405,6 @@ public synchronized void writeDownStream(final HttpPacket httpPacket, final Filt
                     // !!!!! LOCK the deflater
                     sendTrailers(completionHandler, messageCloner, (HttpTrailer) httpContent);
                 }
-                close();
                 return;
             }
 
@@ -651,7 +646,6 @@ private void releaseWriteQueueSpace(final int justSentBytes, final boolean isAto
 
     private void sendTrailers(final CompletionHandler<WriteResult> completionHandler, final MessageCloner<Buffer> messageCloner, final HttpTrailer httpContent)
             throws IOException {
-        http2Session.getDeflaterLock().lock();
         final boolean logging = NetLogger.isActive();
         final Map<String, String> capture = logging ? new HashMap<>() : null;
         List<Http2Frame> trailerFrames = http2Session.encodeTrailersAsHeaderFrames(stream.getId(), new ArrayList<>(4), httpContent.getHeaders(), capture);
@@ -665,7 +659,6 @@ private void sendTrailers(final CompletionHandler<WriteResult> completionHandler
         }
         unflushedWritesCounter.incrementAndGet();
         flushToConnectionOutputSink(trailerFrames, null, new FlushCompletionHandler(completionHandler), messageCloner, true);
-        http2Session.getDeflaterLock().unlock();
         close();
     }