Flaky Test: ActivationCollectorTests.NonReentrantGrainTimer_NoKeepAlive_Test

A test failure was observed in `UnitTests.ActivationsLifeCycleTests.ActivationCollectorTests.NonReentrantGrainTimer_NoKeepAlive_Test`

Error Message:
```
Assert.Equal() Failure: Values differ
Expected: 0
Actual: 1
```

Investigate and fix.