static String getCurrentMonth() {
    return LocalDateTime.ofEpochSecond(time.seconds(), 0, ZONE_OFFSET).format(DATE_TIME_FORMATTER);
  }
Get current month in "yyyy-MM" format.
@return The string representation of current month.
ambry-quota/src/main/java/com/github/ambry/quota/storage/MySqlStorageUsageRefresher.java