test(subscriber): add tests for excessive poll counts #476
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A defect in the way polls are counted was fixed in #440. The defect
caused the polls of a "child" task to also be counted on the "parent"
task. Where in this case, the "parent" is a task that spawns the "child"
task.
This change adds a regression test for that fix.
To do so, functionality to record and validate poll counts is added to
the
console-subscriber
integration test framework. The newfunctionality is also used to add some basic tests for poll counts.