Merge pull request #1021 from cocoa-mhlw/fix/tek_boundary_value

fix boundary value check for tek

src/Covid19Radar.Api.Common/DataAccess/CosmosTemporaryExposureKeyRepository.cs

@@ -39,7 +39,7 @@ public async Task<TemporaryExposureKeyModel[]> GetNextAsync()
  _logger.LogInformation($"start {nameof(GetNextAsync)}");
  var oldest = (int)new DateTimeOffset(DateTime.UtcNow.AddDays(Constants.OutOfDateDays).Date.Ticks, TimeSpan.Zero).ToUnixTimeSeconds() / 600;
  var query = _db.TemporaryExposureKey.GetItemLinqQueryable<TemporaryExposureKeyModel>(true)
- .Where(tek => tek.RollingStartIntervalNumber > oldest)
+ .Where(tek => tek.RollingStartIntervalNumber >= oldest)
  .Where(tek => !tek.Exported)
  .ToFeedIterator();
  var e = Enumerable.Empty<TemporaryExposureKeyModel>();