Queue size display in dot representation of DAG does not reflect the real queue size

[ufukyilmaz]

When the user configures the queue size of the edge to a value that is not a power of 2, we round this value up to the next power of 2 while building the SPSC queues here. But this override is not visible at EdgeConfig and therefore in the dot representation of DAG. I think we should show the real queue size in these dot representation.