Fix too much value of default max_steps of 2560 epoch to 256 epoch
Fix too much value of default max_steps of 2560 epoch to 256 epoch

cshallue/models,tombstone/models,cshallue/models,derekjchow/models,derekjchow/models,tombstone/models,tombstone/models,tombstone/models,cshallue/models,alexgorban/models,tombstone/models,derekjchow/models,alexgorban/models,cshallue/models,alexgorban/models,derekjchow/models,cshallue/models,alexgorban/models,derekjchow/models,tombstone/models,alexgorban/models