public String getMetricsContext() {
    return metricsContext;
  }
Get the metrics context. For hadoop metrics2 system this is usually an all lowercased string.
eg. regionserver, master, thriftserver
@return The string context used to register this source to hadoop's metrics2 system.
hbase-metrics-api/src/main/java/org/apache/hadoop/hbase/metrics/MetricRegistryInfo.java