dropout not available in the pretrained models

[mojtababahrami]

When using the pre-trained models (both grover_base.pt and grover_large.pg) and trying to predict fingerprints for bbbp.csv example dataset the following error is raised saying that the args.dropout field is not found in the state['args']:

[yuliang0225]

I found this Bug. Therefore, I added 2 lines at 36 line in grover/model/models.py.

        if args.backbone == "gtrans" or args.backbone == "dualtrans":
            # dualtrans is the old name.
           ## Add these lines
            if not hasattr(args, "dropout"):
                args.dropout = 0