public List<String> getStreams(String systemName) {
    return getList(String.format(CONFIG_STREAM_LIST, systemName));
  }
Get the list of streams that are defined. Each stream has enough
information for connecting to a certain Event Hubs entity.

@param systemName name of the system
@return list of stream names
samza-azure/src/main/java/org/apache/samza/system/eventhub/EventHubConfig.java