Description of problem:
Currently it is impossible to reliably determine whether an automated test passed.  Example.  

The test is, create an org with a blank name, and verify that an error message pops up saying that is not allowed.

So the automation creates a new org, clicks submit, and there is a notification saying "Sync completed successfully:  foorepo".  

That notification had *nothing* to do with the test, it just happened to pop up at the wrong time.  We know that, but the automation has no way of knowing.  It just knows it was supposed to get a red notification and it got a green one.

Even trying to match the content of the notification doesn't work.  It's impossible for automation to tell the difference between some cryptic error it's never seen before that's caused directly by what it's testing, and some cryptic async error that has nothing to do with what it is testing.

Proposed solution:
Each rest action should return an id somewhere in the HTML, and every notification that results from that action should contain the same id.

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