message: Fix the segment interval for pulling metadata
  The end of the interval would be on the truncated today date, which
  means that you will exclude today. If your realtime ingestion job
  runs shorter than a day, the metadata cannot be pulled from the
  druid cluster.
diff: @@ -492,7 +492,7 @@ class DruidDatasource(Model, BaseDatasource):
  lbound = datetime(1901, 1, 1).isoformat()[:10]
  rbound = datetime(2050, 1, 1).isoformat()[:10]
  if not self.version_higher(self.cluster.druid_version, '0.8.2'):
  - rbound = datetime.now().isoformat()[:10]
  + rbound = datetime.now().isoformat()
  try:
  segment_metadata = client.segment_metadata(
  datasource=self.datasource_name,
  