move data preprocessing test back here

evaluation-suite-ci.py

@@ -20,5 +20,17 @@ class Suite(evaluate.EvaluationSuite):
                     "label_column": "label",
                     "label_mapping": {"NEGATIVE": 0.0, "POSITIVE": 1.0}
                 }
+            ),
+            SubTask(
+                task_type="text-classification",
+                data="imdb",
+                split="test[:2]",
+                data_preprocessor=self.preprocessor,
+                args_for_task={
+                    "metric": "accuracy",
+                    "input_column": "text",
+                    "label_column": "label",
+                    "label_mapping": {"NEGATIVE": 0.0, "POSITIVE": 1.0}
+                }
             )
         ]