[AHC-107] Active uploads that take longer than configured request timeout get cancelled

o Touched future upon operation progress which empirically improves the situation but whether this solves the issue entirely is beyond my current understanding of the internals

Author: bentmann

src/main/java/com/ning/http/client/providers/netty/NettyAsyncHttpProvider.java

@@ -1834,6 +1834,7 @@ public void operationComplete(ChannelFuture cf) {
         }
 
         public void operationProgressed(ChannelFuture cf, long amount, long current, long total) {
+            future.touch();
             if (ProgressAsyncHandler.class.isAssignableFrom(asyncHandler.getClass())) {
                 ProgressAsyncHandler.class.cast(asyncHandler).onContentWriteProgress(amount, current, total);
             }