##### 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
```

version_added: "2.7"
  cleanup:
    description:
      - Use with I(detach=false) to remove the container after successful execution.
    type: bool
    default: no
    version_added: "2.2"
  command:
    description:
      - Command to execute when the container starts.
        A command may be either a string or a list.
      - Prior to version 2.4, strings were split on commas.
    type: raw
  comparisons:
    description:
      - Allows to specify how properties of existing containers are compared with
        module options to decide whether the container should be recreated / updated
        or not. Only options which correspond to the state of a container as handled
        by the Docker daemon can be specified, as well as C(networks).
      - Must be a dictionary specifying for an option one of the keys C(strict), C(ignore)
        and C(allow_more_present).
      - If C(strict) is specified, values are tested for equality, and changes always
        result in updating or restarting. If C(ignore) is specified, changes are ignored.
      - C(allow_more_present) is allowed only for lists, sets and dicts. If it is
        specified for lists or sets, the container will only be updated or restarted if
        the module option contains a value which is not present in the container's
        options. If the option is specified for a dict, the container will only be updated
        or restarted if the module option contains a key which isn't present in the
        container's option, or if the value of a key present differs.
      - The wildcard option C(*) can be used to set one of the default values C(strict)