MI parallel completion condition

[burnettk]

And this one doesn't seem to work as expected. It should ouput only up to 4 because of the completion condition. But it doesn't work like that.

https://dev.mod.spiff.status.im/process-models/misc:qa:bpmn-model-testing:unit-test-multi-instance-parallel-loop-cardinality https://dev.mod.spiff.status.im/i/36220 This is how the output looks in dev.app for the same model - https://dev.app.spiff.status.im/i/3599

see discussion between jasquant and elizabeth on #1362