Fix flaky limiter test (#284)
Fix flaky limiter test (#284)

* Fix flaky limiter test

TestStop sets a max duration of a millisecond after which it stops the
limiter. If that happens before we've called `.More()` 100 times, then
it causes the test to fail.

Make the limiter have no max limit or duration to avoid flakiness.
Tested with `-count 1000` to verify.

* Stop multiple times

yarpc/yab,yarpc/yab,yarpc/yab