##### 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
```

return sorted((a, str(b)) for a, b in x.items())
                        if p is not None:
                            p = sorted(p, key=sort_key_fn)
                        if c is not None:
                            c = sorted(c, key=sort_key_fn)
                    differences.add(key, parameter=p, active=c)
        has_differences = not differences.empty
        return has_differences, differences
    def has_different_resource_limits(self):
        '''
        Diff parameters and container resource limits
        '''
        if not self.container.get('HostConfig'):
            self.fail("limits_differ_from_container: Error parsing container properties. HostConfig missing.")
        if self.parameters.client.docker_api_version < LooseVersion('1.22'):
            
            return False, []
        host_config = self.container['HostConfig']
        config_mapping = dict(
            blkio_weight=host_config.get('BlkioWeight'),
            cpu_period=host_config.get('CpuPeriod'),
            cpu_quota=host_config.get('CpuQuota'),
            cpu_shares=host_config.get('CpuShares'),
            cpuset_cpus=host_config.get('CpusetCpus'),
            cpuset_mems=host_config.get('CpusetMems'),
            kernel_memory=host_config.get("KernelMemory"),
            memory=host_config.get('Memory'),
            memory_reservation=host_config.get('MemoryReservation'),
            memory_swap=host_config.get('MemorySwap'),