Running several experiments at one time

I've got a docker error while trying to run several experiments

```
INFO:root:Starting dispatcher with container name: dispatcher-container
docker: Error response from daemon: Conflict. The container name "/dispatcher-container" is already in use by container "cc2efebfc84f3d92bcd3503e33504c9bdb4d1e4f99e8d0307ce57386d9f7c062". You have to remove (or rename) that container to be able to reuse that name.
See 'docker run --help'.
```

After a bit of research, I found out that `container_name` is hardcoded to `dispatcher-container`: https://github.com/google/fuzzbench/blob/ba22647276a63912312fb6636287cc266da19683/experiment/run_experiment.py#L467

And that causes docker to produce an error because container with that name is already in use.

Is there any way to run several experiments at one time? Thanks.