Adding new command line arguments

ml-agents/mlagents/trainers/learn.py

         )
 
     trainer_config = load_config(trainer_config_path)
+    reset_param_dict = load_config(reset_param_dict_path)
     env_factory = create_environment_factory(
         env_path,
         docker_target_name,

ml-agents/mlagents/trainers/trainer_controller.py

 
 
 class TrainerController(object):
+    # Type of reset_param_dict unspecified as typing library does not support heterogeneous dictionary types
     def __init__(
         self,
         trainers: Dict[str, Trainer],