Pass model_kwargs when loading a model in pipeline() (#12449)

* Pass model_kwargs when loading a model in pipeline

* Add test for model_kwargs parameter of pipeline()

* Rewrite test to not download model

* Fix failing style checks

tests/test_pipelines_token_classification.py

@@ -61,6 +61,13 @@ class TokenClassificationPipelineTests(CustomInputPipelineCommonMixin, unittest.
             for key in output_keys:
                 self.assertIn(key, result)
 
+    @require_torch
+    def test_model_kwargs_passed_to_model_load(self):
+        ner_pipeline = pipeline(task="ner", model=self.small_models[0])
+        self.assertFalse(ner_pipeline.model.config.output_attentions)
+        ner_pipeline = pipeline(task="ner", model=self.small_models[0], model_kwargs={"output_attentions": True})
+        self.assertTrue(ner_pipeline.model.config.output_attentions)
+
     @require_torch
     @slow
     def test_spanish_bert(self):