private static Properties getRouterProps(String routerDatacenter) {
    Properties properties = new Properties();
    properties.setProperty("router.hostname", "localhost");
    properties.setProperty("router.datacenter.name", routerDatacenter);
    properties.setProperty("router.get.cross.dc.enabled", "true");
    properties.setProperty("clustermap.cluster.name", "test");
    properties.setProperty("clustermap.datacenter.name", routerDatacenter);
    properties.setProperty("clustermap.host.name", "localhost");
    return properties;
  }
Generate and return {@link Properties} to instantiate {@link Router}
@param routerDatacenter Router's datacentre
@return the {@link Properties} thus constructed
ambry-test-utils/src/main/java/com/github/ambry/server/ServerTestUtil.java