fix

test=develop

Author: panyx0718

python/paddle/fluid/tests/unittests/test_dist_base.py

@@ -105,7 +105,7 @@ def run_trainer(self, args):
             build_stra.reduce_strategy = fluid.BuildStrategy.ReduceStrategy.AllReduce
 
         if args.batch_merge_repeat > 1:
-            pass_builder = build_stra._create_passes_from_strategy()
+            pass_builder = build_stra._finalize_strategy_and_create_passes()
             mypass = pass_builder.insert_pass(
                 len(pass_builder.all_passes()) - 2, "multi_batch_merge_pass")
             mypass.set_int("num_repeats", args.batch_merge_repeat)