##### 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
```

'''
        Turn tmpfs into a hash of Tmpfs objects
        '''
        result = dict()
        if self.tmpfs is None:
            return result
        for tmpfs_spec in self.tmpfs:
            split_spec = tmpfs_spec.split(":", 1)
            if len(split_spec) > 1:
                result[split_spec[0]] = split_spec[1]
            else:
                result[split_spec[0]] = ""
        return result
    def _get_environment(self):