Non-Interruptive Events : Assertions in events

We should be able to have events sense issues, and that at the end of a scenario we can query the event for feedback, and probably assertions.

Start by tracing how events are represented and how a scenario ends in this TestNG plugin. The issue provides no file or test names, so repository exploration is required to define event feedback and assertion behavior and establish an observable completion criterion.

Written by the indexing model from the issue text.