LogThrottlingHelper: the dependent recorder is not triggered correctly

The current implementation of LogThrottlingHelper works well most of the time, but it missed out one case, which appears quite common in the production codes:

• if the dependent recorder was not suppressed before the primary one is triggered on the next period, then the next logging of the dependent recorder will be unexpectedly suppressed.

    helper = new LogThrottlingHelper(LOG_PERIOD, "foo", timer);

    assertTrue(helper.record("foo", 0).shouldLog());
    assertTrue(helper.record("bar", 0).shouldLog());

    // Both should log once the period has elapsed
    // <pos1>
    assertTrue(helper.record("foo", LOG_PERIOD).shouldLog());
    assertTrue(helper.record("bar", LOG_PERIOD).shouldLog()); <--- This assertion will now fail

Note if we call helper.record("bar", LOG_PERIOD * 2) in <pos1>, as the existing test cases do, it will work as expected.