fix bc tests

ml-agents/mlagents/trainers/ppo/trainer.py

 
         self.saver.register(self.policy)
         self.saver.register(self.optimizer)
-        self.saver.initialize_or_load(self.policy)
+        self.saver.initialize_or_load()
 
         # Needed to resume loads properly
         self.step = policy.get_current_step()

ml-agents/mlagents/trainers/sac/trainer.py

 
         self.saver.register(self.policy)
         self.saver.register(self.optimizer)
-        self.saver.initialize_or_load(self.policy)
+        self.saver.initialize_or_load()
 
         # Needed to resume loads properly
         self.step = policy.get_current_step()

ml-agents/mlagents/trainers/tests/torch/test_bcmodule.py

         NetworkSettings.MemorySettings() if use_rnn else None
     )
     policy = TorchPolicy(
-        0,
-        mock_behavior_specs,
-        trainer_config,
-        "test",
-        False,
-        tanhresample,
-        tanhresample,
+        0, mock_behavior_specs, trainer_config, tanhresample, tanhresample
     )
     bc_module = BCModule(
         policy,