##### 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
```
state: started
    healthcheck:
      # The "NONE" check needs to be specified
      test: ["NONE"]
- name: start container with block device read limit
  docker_container:
    name: test
    image: ubuntu:18.04
    state: started
    device_read_bps:
      # Limit read rate for /dev/sda to 20 mebibytes per second
      - path: /dev/sda
        rate: 20M
    device_read_iops:
      # Limit read rate for /dev/sdb to 300 IO per second
      - path: /dev/sdb
        rate: 300
'''
RETURN = '''
container:
    description:
      - Facts representing the current state of the container. Matches the docker inspection output.
      - Note that facts are part of the registered vars since Ansible 2.8. For compatibility reasons, the facts
        are also accessible directly as C(docker_container). Note that the returned fact will be removed in Ansible 2.12.
      - Before 2.3 this was C(ansible_docker_container) but was renamed in 2.3 to C(docker_container) due to
        conflicts with the connection plugin.
      - Empty if C(state) is I(absent)
      - If detached is I(False), will include Output attribute containing any output from container run.
    returned: always
    type: dict