private VerifiableProperties getNonBlockingRouterProperties() {
    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));
    return new VerifiableProperties(properties);
  }
Get default {@link Properties}.
@return {@link Properties} with default values.
ambry-router/src/test/java/com/github/ambry/router/ChunkFillTest.java