##### SUMMARY
`esc_period` is mandatory even with `state: absent` - should be optional in that case.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
zabbix_action

##### ANSIBLE VERSION
latest

##### CONFIGURATION
Not relevant.

##### OS / ENVIRONMENT
Not relevant.

##### STEPS TO REPRODUCE
```yaml
  - name: "Report problems to Zabbix administrators"
    event_source: 'trigger'
    state: absent
```

##### EXPECTED RESULTS
Action, if exists, is removed.

##### ACTUAL RESULTS
```paste below
"msg": "missing required arguments: esc_period"
```
type='str',
                        required=False,
                        choices=['agent', 'server', 'proxy']
                    ),
                    password=dict(type='str', required=False),
                    port=dict(type='int', required=False),
                    run_on_groups=dict(type='list', required=False),
                    run_on_hosts=dict(type='list', required=False),
                    script_name=dict(type='str', required=False),
                    ssh_auth_type=dict(
                        type='str',
                        required=False,
                        default='password',
                        choices=['password', 'public_key']
                    ),
                    ssh_privatekey_file=dict(type='str', required=False),
                    ssh_publickey_file=dict(type='str', required=False),
                    username=dict(type='str', required=False),
                    
                    media_type=dict(type='str', required=False),
                    subject=dict(type='str', required=False),
                    message=dict(type='str', required=False),
                    send_to_groups=dict(type='list', required=False),
                    send_to_users=dict(type='list', required=False),
                ),
                required_if=[
                    ['type', 'remote_command', ['command_type']],
                    ['type', 'remote_command', [
                        'run_on_groups',
                        'run_on_hosts'