public static AutoBalancerMetrics toAutoBalancerMetric(long nowMs,
                                                           int brokerId,
                                                           String brokerRack,
                                                           com.yammer.metrics.core.MetricName metricName,
                                                           double value) {
        return toAutoBalancerMetric(nowMs, brokerId, brokerRack, metricName, value, null);
    }
Create a Auto Balancer Metric.

@param nowMs      The current time in milliseconds.
@param brokerId   Broker Id.
@param metricName Yammer metric name.
@param value      Metric value
@return A Yammer metric converted as a AutoBalancerMetric.
core/src/main/java/kafka/autobalancer/metricsreporter/metric/MetricsUtils.java