Attribute overriding in SourceQueueWithComplete

[petervecera-jr]

Hi today I've found a bug regarding name attribute overriding in SourceQueueWithComplete.

If I create a Source.queue like this Source.queue[Int](10, OverflowStrategy.dropHead)

It calls following method:

 def queue[T](
	bufferSize: Int,
    overflowStrategy: OverflowStrategy,
    maxConcurrentOffers: Int): Source[T, SourceQueueWithComplete[T]] =
    Source.fromGraph(new QueueSource(bufferSize, overflowStrategy, maxConcurrentOffers).withAttributes(DefaultAttributes.queueSource))

Here it calls withAttributes(DefaultAttributes.queueSource) which overrides any given name to the graph component.

From my observation, I assume that the strategy of name attribute overriding is incorrect. Because the very first attribute is used and the rest is discarded.