private RouterConfig createRouterConfig(boolean isReservedMetadataEnabled) {
    Properties properties = new Properties();
    properties.setProperty("router.hostname", "localhost");
    properties.setProperty("router.datacenter.name", "DC1");
    properties.setProperty("router.max.put.chunk.size.bytes", Integer.toString(chunkSize));
    properties.setProperty("router.put.request.parallelism", Integer.toString(requestParallelism));
    properties.setProperty("router.put.success.target", Integer.toString(successTarget));
    properties.setProperty("router.compression.enabled", "true");
    properties.setProperty("router.compression.minimal.ratio", "1.0");
    properties.setProperty("router.compression.minimal.content.size", "1");
    properties.setProperty("router.reserved.metadata.enabled", Boolean.toString(isReservedMetadataEnabled));
    VerifiableProperties vProps = new VerifiableProperties(properties);
    return new RouterConfig(vProps);
  }
Create {@link RouterConfig} with the specified isReservedMetadataEnabled.
@param isReservedMetadataEnabled {@code true} if reserved metadata is enabled. {@code false} otherwise.
@return RouterConfig object.
ambry-router/src/test/java/com/github/ambry/router/PutOperationTest.java