Workaround for Eclipse

- Current Eclipse compiler fails to infer appropriate
  generic type.
  Workaround the issue by explicitly specifying the type.

  Might be related to:
   https://bugs.eclipse.org/bugs/show_bug.cgi?id=467561

Change-Id: I7f41fd1a33f165fa8a57120a6f9a42cf587f94cc

@@ -91,7 +91,7 @@ public class DefaultDistributedQueue<E>  implements DistributedQueue<E> {
                        .whenComplete((r, e) -> timer.stop(e))
                        .whenComplete((r, e) -> timer.stop(e))
                        .thenCompose(v -> {
                        .thenCompose(v -> {
                            if (v != null) {
                            if (v != null) {
-                               return CompletableFuture.completedFuture(serializer.decode(v));
+                               return CompletableFuture.<E>completedFuture(serializer.decode(v));
                            }
                            }
                            CompletableFuture<E> newPendingFuture = new CompletableFuture<>();
                            CompletableFuture<E> newPendingFuture = new CompletableFuture<>();
                            pendingFutures.add(newPendingFuture);
                            pendingFutures.add(newPendingFuture);