##### SUMMARY
`docker_container` should so some sanity checks that not two volumes / mount points use the same target inside the container, so that especially when recreating containers, they won't be destroyed first before recreating fails.

This becomes more important once #49808 is merged.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
docker_container

##### ANSIBLE VERSION
```
2.8.0
```

updated_container = container
        if self.parameters.comparisons['networks']['comparison'] != 'ignore' or container_created:
            has_network_differences, network_differences = container.has_network_differences()
            if has_network_differences:
                if self.diff.get('differences'):
                    self.diff['differences'].append(dict(network_differences=network_differences))
                else:
                    self.diff['differences'] = [dict(network_differences=network_differences)]
                for netdiff in network_differences:
                    self.diff_tracker.add(
                        'network.{0}'.format(netdiff['parameter']['name']),
                        parameter=netdiff['parameter'],
                        active=netdiff['container']
                    )
                self.results['changed'] = True
                updated_container = self._add_networks(container, network_differences)
        if (self.parameters.comparisons['networks']['comparison'] == 'strict' and self.parameters.networks is not None) or self.parameters.purge_networks:
            has_extra_networks, extra_networks = container.has_extra_networks()
            if has_extra_networks:
                if self.diff.get('differences'):
                    self.diff['differences'].append(dict(purge_networks=extra_networks))
                else:
                    self.diff['differences'] = [dict(purge_networks=extra_networks)]
                for extra_network in extra_networks:
                    self.diff_tracker.add(
                        'network.{0}'.format(extra_network['name']),
                        active=extra_network