Rate is Cleared After NewRelic Reporter Executes

[armona]

It seems that the NewRelic reporter clears the metrics data after execution, see the weird data:

{
        "1m_rate": 0,
        "999_percentile": 3.2815070152282715,
        "50_percentile": 2.8793689012527466,
        "15m_rate": 0,
        "99_percentile": 3.218465518951416,
        "mean_rate": 77.00710875424882,
        "max": 3.2815070152282715,
        "sum": 954.7672119140625,
        "min": 2.5769171714782715,
        "5m_rate": 0,
        "count": 334,
        "75_percentile": 2.9054850339889526,
        "std_dev": 0.09961026476365618,
        "95_percentile": 2.9539148807525635,
        "avg": 2.8585844668085705
}

A fix should include tests to verify the bug

[amir-jakoby]

Up for the grabs