@Before
  public void initializeCluster() throws IOException {
    clusterMap = new MockClusterMap(false, true, 1, 3, 3, false, false, null);
    metricRegistry = clusterMap.getMetricRegistry();
    generateConfigs(false, false);
  }
Startup the {@link MockClusterMap} for a test.
@throws IOException
ambry-store/src/test/java/com/github/ambry/store/StorageManagerTest.java