##### SUMMARY
Hi,

When you want to pass an empty list or a null/None value to published_ports on docker_container it's actually impossible, so you get this error

```
File \"/tmp/ansible_docker_container_payload_ZOZc5l/__main__.py\", line 1448, in _parse_publish_ports\r\n  File \"/tmp/ansible_docker_container_payload_ZOZc5l/__main__.py\", line 1003, in parse_port_range\r\nValueError: invalid literal for int() with base 10: ''\r\n",
 ```

Ref #61602

The problem is that we parse via `_parse_publish_ports` the parameter if self.published_ports is not None or not 'all'
Also after that there is no control on each elements of the list, (not like for the volumes parameter by example)

So I propose to patch line 1151
`self.published_ports = self._parse_publish_ports() `
to
`self.published_ports = self._parse_publish_ports() if self.published_ports else None`

Best regards

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
* docker_container

##### ANSIBLE VERSION

```
ansible 2.8.4
```
sample: '{
        "AppArmorProfile": "",
        "Args": [],
        "Config": {
            "AttachStderr": false,
            "AttachStdin": false,
            "AttachStdout": false,
            "Cmd": [
                "/usr/bin/supervisord"
            ],
            "Domainname": "",
            "Entrypoint": null,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
            ],
            "ExposedPorts": {
                "443/tcp": {},
                "80/tcp": {}
            },
            "Hostname": "8e47bf643eb9",
            "Image": "lnmp_nginx:v1",
            "Labels": {},
            "OnBuild": null,
            "OpenStdin": false,
            "StdinOnce": false,
            "Tty": false,
            "User": "",
            "Volumes": {
                "/tmp/lnmp/nginx-sites/logs/": {}
            },