##### SUMMARY
If there's currently a container with image `repo/name:tag1` running (or created), and I change the `docker_container` image tag to `repo/name:tag2` (where this image hasn't been pulled yet), `docker_container` will not notice that the image changed and will not recreate the container.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
docker_container

##### ANSIBLE VERSION
```paste below
2.9.0
```

"""
        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):