Fix paiio read full table bug (#2849)

* Remove hdfs params in Python

* fomat code

* Cleanup submitter code

* fix paiio read bug

Author: lhw362950217

python/runtime/pai/submitter_test.py

@@ -162,7 +162,6 @@ def test_submit_pai_train_task(self):
             feature_metas=iris_feature_metas,
             label_meta=iris_label_meta,
             validation_metrics="Accuracy".split(","),
-            save="model_save",
             batch_size=1,
             epoch=1,
             validation_steps=1,

python/runtime/xgboost/explain.py

@@ -51,9 +51,10 @@ def xgb_shap_dataset(datasource,
         # (TODO: lhw) we may specify pai_explain_table in datasoure
         # and discard the condition statement here
         conn = PaiIOConnection.from_table(pai_explain_table)
+        stream = db.db_generator(conn, None, label_meta)
     else:
         conn = db.connect_with_data_source(datasource)
-    stream = db.db_generator(conn, select, label_meta)
+        stream = db.db_generator(conn, select, label_meta)
     selected_cols = db.selected_cols(conn, select)
 
     if transform_fn: