message: sql_lab: re-raise exception in get_sql_results
  As caller expect it to raise an exception instead of returning
  None.
  Refs
diff: @@ -98,6 +98,7 @@ def get_sql_results(
  query.status = QueryStatus.FAILED
  query.tmp_table_name = None
  sesh.commit()
  + raise
  def execute_sql(ctask, query_id, return_results=True, store_results=False):
  