Use ActiveStoreSvc to pick event store Fix ATLASSIM-4604
The EventSelectorByteStream and ByteStreamInputSvc should always refer to same event store. The ActiveStoreSvc should ensure this even in configurations with multiple and/or custom event stores, such as overlay jobs.
Note that in the latest nightly the overlay transform I introduced this for still breaks because of a recent, independent change (BCMOverlay algorithm). The transform runs (locally tested) r08 with this change.