Revert the change in get_result_from_cursor to fix test (#279)

dbt/adapters/glue/connections.py

@@ -101,7 +101,7 @@ def get_response(cls, cursor) -> AdapterResponse:
     def get_result_from_cursor(cls, cursor: GlueCursor, limit: Optional[int]) -> agate.Table:
         data: List[Any] = []
         column_names: List[str] = []
-        if not cursor.description:
+        if cursor.description is not None:
             column_names = [col[0] for col in cursor.description()]
             if limit:
                 rows = cursor.fetchmany(limit)