##### 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"
```
- uptime_or_downtime_duration
                    - received_value
                    - discovery_rule
                    - discovery_check
                    - proxy
                    - discovery_object
                    # auto_registration
                    - proxy
                    - host_name
                    - host_metadata
                    # internal
                    - host_group
                    - host
                    - host_template
                    - application
                    - event_type
            value:
                description:
                    - Value to compare with.
                    - When I(type) is set to C(discovery_status), the choices
                      are C(up), C(down), C(discovered), C(lost).
                    - When I(type) is set to C(discovery_object), the choices
                      are C(host), C(service).
                    - When I(type) is set to C(event_type), the choices
                      are C(item in not supported state), C(item in normal state),
                      C(LLD rule in not supported state),
                      C(LLD rule in normal state), C(trigger in unknown state), C(trigger in normal state).
                    - When I(type) is set to C(trigger_severity), the choices
                      are (case-insensitive) C(not classified), C(information), C(warning), C(average), C(high), C(disaster)
                      irrespective of user-visible names being changed in Zabbix. Defaults to C(not classified) if omitted.