private Properties getProperties() {
    Properties props = new Properties();
    props.setProperty(ClusterMapConfig.DELETE_DATA_FROM_DATANODE_CONFIG_IN_PROPERTY_STORE_CLEAN_UP_TASK, "true");
    props.setProperty(ClusterMapConfig.ENABLE_PROPERTY_STORE_CLEAN_UP_TASK, "true");
    props.setProperty(ClusterMapConfig.CLUSTERMAP_DATA_NODE_CONFIG_SOURCE_TYPE,
        DataNodeConfigSourceType.PROPERTY_STORE.name());
    props.setProperty(ClusterMapConfig.CLUSTERMAP_CLUSTER_NAME, CLUSTER_NAME);
    props.setProperty(ClusterMapConfig.CLUSTERMAP_DATACENTER_NAME, DC);
    props.setProperty(ClusterMapConfig.CLUSTERMAP_HOST_NAME, HOST_NAME);
    return props;
  }
Case when no instance is down and all instances are present in ideal state or external view
@param helixManager
@param dataNodeConfigSource
@return
ambry-clustermap/src/test/java/com/github/ambry/clustermap/PropertyStoreCleanUpTaskTest.java