Specifically, no longer test for a p1 zendesk when sending an alert
and drop misleading "p1" from test name when cancelling an alert.
We're no longer creating a P1 from the code, but we _do_ create a
zendesk ticket when sending out an alert.
When cancelling, what we want to test is that we don't create a second
ticket when the alert is cancelled.
9faa3d34e1