Use getNow() in GenericFutureListener. operationComplete instead of get()

Author: slandelle

client/src/main/java/org/asynchttpclient/netty/SimpleGenericFutureListener.java

@@ -21,7 +21,7 @@ public abstract class SimpleGenericFutureListener<V> implements GenericFutureLis
  @Override
  public final void operationComplete(Future<V> future) throws Exception {
  if (future.isSuccess()) {
- onSuccess(future.get());
+ onSuccess(future.getNow());
  } else {
  onFailure(future.cause());
  }