QwenTransformer python api and tests

Author: prabod

python/test/annotator/seq2seq/qwen_transformer_test.py

@@ -20,7 +20,7 @@
 from test.util import SparkContextForTest
 
 
-@pytest.mark.fast
+@pytest.mark.slow
 class QwenTransformerTextGenerationTestSpec(unittest.TestCase):
     def setUp(self):
         self.spark = SparkContextForTest.spark