##### SUMMARY
[`zabbix_host`](https://docs.ansible.com/ansible/latest/modules/zabbix_host_module.html) module currently does not support specifying usermacros.

While usermacros can be added separately with [`zabbix_hostmacro`](https://docs.ansible.com/ansible/latest/modules/zabbix_hostmacro_module.html) module, that splits up the configuration and makes it very hard to maintain.

It would be great to specify macros in the host definition of `zabbix_host`.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
zabbix_host
if interface['type'] in interfacetypes.keys():
                interface['type'] = interfacetypes[interface['type']]
            if interface['type'] < 1 or interface['type'] > 4:
                module.fail_json(msg="Interface type can only be 1-4 for interface '%s'." % interface)
            if 'useip' not in interface:
                interface['useip'] = 0
            if 'dns' not in interface:
                if interface['useip'] == 0:
                    module.fail_json(msg="dns needs to be set if useip is 0 on interface '%s'." % interface)
                interface['dns'] = ''
            if 'ip' not in interface:
                if interface['useip'] == 1:
                    module.fail_json(msg="ip needs to be set if useip is 1 on interface '%s'." % interface)
                interface['ip'] = ''
            if 'main' not in interface:
                interface['main'] = 0
            if 'port' in interface and not isinstance(interface['port'], str):
                try:
                    interface['port'] = str(interface['port'])
                except ValueError:
                    module.fail_json(msg="port should be convertable to string on interface '%s'." % interface)
            if 'port' not in interface:
                if interface['type'] == 1:
                    interface['port'] = "10050"
                elif interface['type'] == 2:
                    interface['port'] = "161"
                elif interface['type'] == 3:
                    interface['port'] = "623"
                elif interface['type'] == 4:
                    interface['port'] = "12345"