##### SUMMARY
When specifying only action name and state "absent", that fails with "missing required arguments: event_source".
Zabbix action names are unique across types (event sources), thus the event source parameter in this case is not mandated by the Zabbix API.
It would be great to either lift this limitation, or add an example in the documentation explaining why it's there.

##### 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"
    state: absent
```

##### EXPECTED RESULTS
Either success, or documented special limitation.

##### ACTUAL RESULTS
```
failed: [host] (item={u'state': u'absent', u'name': u'Report problems to Zabbix administrators'}) => {"ansible_loop_var": "item", "changed": false, "item": {"name": "Report problems to Zabbix administrators", "state": "absent"}, "msg": "missing required arguments: event_source"}
```
"""Construct the acknowledge operations data using helper methods.
        Args:
            operation: operation to construct
        Returns:
            list: constructed acknowledge operations data
        """
        constructed_data = []
        for op in operations:
            operation_type = self._construct_operationtype(op)
            constructed_operation = {
                'operationtype': operation_type,
            }
            
            if constructed_operation['operationtype'] in ('0', '11'):
                constructed_operation['opmessage'] = self._construct_opmessage(op)
                constructed_operation['opmessage_usr'] = self._construct_opmessage_usr(op)
                constructed_operation['opmessage_grp'] = self._construct_opmessage_grp(op)
            
            if constructed_operation['operationtype'] == '1':
                constructed_operation['opcommand'] = self._construct_opcommand(op)
                constructed_operation['opcommand_hst'] = self._construct_opcommand_hst(op)
                constructed_operation['opcommand_grp'] = self._construct_opcommand_grp(op)
            constructed_data.append(constructed_operation)
        return cleanup_data(constructed_data)
class Filter(object):
    """
    Restructures the user defined filter conditions to fit the Zabbix API requirements
    """
    def __init__(self, module, zbx, zapi_wrapper):