Microsoft-CISL/REEF — pull request #881 by markusweimer (2014-06-25 23:56:39+00:00)
Title: Improved the generation of FailedEvaluator

This closes #880:
* Changed `EvaluatorRuntime` such that unexpected calls to the `RuntimeStopHandler` result in a `FailedEvaluator`
* Added a test that proofs that it works

Also, I made unrelated updates to the code:
* Renamed methods in `HeartBeatManager` from `onNext(...)` to more speaking names like `sendTaskStatus()`