Update lora.py to fix the AttributeError: can't set attribute issue

[SuperBruceJia]

There is an issue when I load the (locally saved) adapter:

File "/projectnb/pnn/test_2/IntuitLLMProject/lib/data_manager.py", line 135, in d_eval_g_data_loader
  lora.LoRAModel.from_pretrained(pipe.llm_engine.workers[0].model, g_saver_dir + '/adapter')
File "/projectnb/pnn/test_2/vllm/vllm/model_executor/adapters/lora.py", line 62, in from_pretrained
  cls.load_adapter(layers, config)
File "/projectnb/pnn/test_2/vllm/vllm/model_executor/adapters/lora.py", line 70, in load_adapter
  new_model = VllmLoRA(
File "/projectnb/pnn/test_2/vllm/vllm/model_executor/adapters/lora.py", line 34, in __init__
  self.active_adapter = adapter_name
File "/usr4/ec523/brucejia/.local/lib/python3.8/site-packages/torch/nn/modules/module.py", line 1754, in __setattr__
  super().__setattr__(name, value)
AttributeError: can't set attribute

Thank you very much again for your excellent work! It truly helps!