##### SUMMARY
`docker_container` should so some sanity checks that not two volumes / mount points use the same target inside the container, so that especially when recreating containers, they won't be destroyed first before recreating fails.

This becomes more important once #49808 is merged.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
docker_container

##### ANSIBLE VERSION
```
2.8.0
```

"""
        Format device_read_bps and device_write_bps option
        """
        devices_list = []
        for v in getattr(self, option):
            device_dict = dict((x.title(), y) for x, y in v.items())
            device_dict['Rate'] = human_to_bytes(device_dict['Rate'])
            devices_list.append(device_dict)
        setattr(self, option, devices_list)
    def _process_rate_iops(self, option):