Merge branch 'master' into alerting_reminder

* master: (84 commits)
  docs: adds info about grafana-dev container
  changelog: add notes about closing #12282
  Added Litre/min and milliLitre/min in Flow (#12282)
  remove papaparse dependency
  list name is deleteDatasources, not delete_datasources
  remove internal influx ifql datasource
  Document the endpoint for deleting an org
  tests: rewrite into table tests
  influxdb: adds mode func to backend
  changelog: add notes about closing #11484
  changelog: add notes about closing #11233
  Remove import
  Fix PR feedback
  Removed papaparse from external plugin exports
  Karma to Jest: query_builder
  dsproxy: move http client variable back
  Karma to Jest: threshold_mapper
  Expose react and slate to external plugins
  Karma to Jest: threshold_manager
  Karma to Jest: query_def, index_pattern
  ...

pkg/services/sqlstore/sqlstore.go

@@ -89,7 +89,7 @@ func (ss *SqlStore) ensureAdminUser() error {
 	systemUserCountQuery := m.GetSystemUserCountStatsQuery{}
 
 	if err := bus.Dispatch(&systemUserCountQuery); err != nil {
-		fmt.Errorf("Could not determine if admin user exists: %v", err)
+		return fmt.Errorf("Could not determine if admin user exists: %v", err)
 	}
 
 	if systemUserCountQuery.Result.Count > 0 {