Add yaml test for FailSafe timeout test

[yufengwangca]

Problem

Also if I am not missing anything that means we need to capture the two "command has been invoked" booleans in the event. Those and the fabric index are the only things this function uses from the failsafe context, and the index is already in the event.

And we should have tests here. Doing AddNOC in yaml is not exactly trivial right now, but if we can add a way to do that, we could presumably test this with a very short failsafe period.....

Proposed Solution

<suggested fix, suggested enhancement>