@Override
      public boolean matches(String name, Metric metric) {
        return name.endsWith("thPercentile");
      }
Test that {@link NonBlockingRouterMetrics} can correctly register custom percentiles. An example of metric name is:
"com.github.ambry.router.GetOperation.LocalColoLatencyMs.91.0.thPercentile"
ambry-router/src/test/java/com/github/ambry/router/AdaptiveOperationTrackerTest.java