Event-Based Gateway: Multiple timer events fire

[burnettk]

Pointed out by Volker, "How do “Last milestone” == “Completed” and “Status “ == “Waiting” fit together? It doesn’t make too much sense to me." See attached process model Zip. Once one event fires, the gateway must conclude.

Downloads.zip

[essweine]

The way event based gateways are implemented in the library is a real hack and on further investigation I don't think they work properly with timers. We should probably revisit how they work in the library. I opened this ticket with a little more explanation: sartography/SpiffWorkflow#419