Asaph Zylbertal

Worked for me by just turning off add_uid, eg with a small change to the run_r2d2.py example: ``` return experiments.ExperimentConfig( builder=r2d2.R2D2Builder(config), network_factory=r2d2.make_atari_networks, environment_factory=environment_factory, seed=FLAGS.seed, checkpointing=experiments.CheckpointingConfig(add_uid=False), # turn off the uid...