Test ordered timeframes #481
Description
The test case "ePIC_Timeframe_Splitting" in UnfoldTests.cc currently runs sequentially. We would like to run it with multithreading turned on as well. However, if we do so, currently it will not pass, because the timeframes sometimes reach the splitter out of order. Ideally we would simply need to call EnableOrdering() from the splitter constructor. However, this has never been tested, so it might not work.
While working on this, we might also want to refactor the test case so that the expected results are keyed off of timeframe index and physics event index. That way we could test all four cases of (splitter_ordering_enabled, processor_ordering_enabled).