##### 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
```

domainname=dict(type='str'),
        entrypoint=dict(type='list', elements='str'),
        env=dict(type='dict'),
        env_file=dict(type='path'),
        etc_hosts=dict(type='dict'),
        exposed_ports=dict(type='list', elements='str', aliases=['exposed', 'expose']),
        force_kill=dict(type='bool', default=False, aliases=['forcekill']),
        groups=dict(type='list', elements='str'),
        healthcheck=dict(type='dict', options=dict(
            test=dict(type='raw'),
            interval=dict(type='str'),
            timeout=dict(type='str'),
            start_period=dict(type='str'),
            retries=dict(type='int'),
        )),
        hostname=dict(type='str'),
        ignore_image=dict(type='bool', default=False),
        image=dict(type='str'),
        init=dict(type='bool', default=False),
        interactive=dict(type='bool', default=False),
        ipc_mode=dict(type='str'),
        keep_volumes=dict(type='bool', default=True),
        kernel_memory=dict(type='str'),
        kill_signal=dict(type='str'),
        labels=dict(type='dict'),
        links=dict(type='list', elements='str'),
        log_driver=dict(type='str'),
        log_options=dict(type='dict', aliases=['log_opt']),
        mac_address=dict(type='str'),
        memory=dict(type='str', default='0'),