##### 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"
```
"""Get host by host name
        Args:
            host_name: host name.
        Returns:
            host matching host name
        """
        try:
            host_list = self._zapi.host.get({
                'output': 'extend',
                'selectInventory': 'extend',
                'filter': {'host': [host_name]}
            })
            if len(host_list) < 1:
                self._module.fail_json(msg="Host not found: %s" % host_name)
            else:
                return host_list[0]
        except Exception as e:
            self._module.fail_json(msg="Failed to get host '%s': %s" % (host_name, e))
    def get_hostgroup_by_hostgroup_name(self, hostgroup_name):