One line batch settings

[sduskis]

There are a bunch of good batch settings:

    Configuration config = new Configuration(false);

    config.set(BigtableOptionsFactory.BIGTABLE_USE_CACHED_DATA_CHANNEL_POOL, "true");

    // Beam should use a different endpoint for data operations than online traffic.
    config.set(BigtableOptionsFactory.BIGTABLE_HOST_KEY,
      BigtableOptions.BIGTABLE_BATCH_DATA_HOST_DEFAULT);

    config.set(BigtableOptionsFactory.INITIAL_ELAPSED_BACKOFF_MILLIS_KEY,
      String.valueOf(TimeUnit.SECONDS.toMillis(5)));

    config.set(BigtableOptionsFactory.MAX_ELAPSED_BACKOFF_MILLIS_KEY,
      String.valueOf(TimeUnit.MINUTES.toMillis(5)));

this should be a one-liner. Also, it should encourage setting environment via the user agent.