##### SUMMARY
If you import a template with a xml/json file the linked templates of a templates ( so the child templates not the root ones ) aren't processed if you want to remove linked templates.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
zabbix_templates

##### ANSIBLE VERSION
```shell
ansible 2.9.2
  config file = /mnt/d/Code/gitlab/zabbix-servers/ansible/ansible.cfg
  configured module search path = ['/home/fism/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /mnt/d/Code/gitlab/zabbix-servers/venv/lib/python3.6/site-packages/ansible
  executable location = /mnt/d/Code/gitlab/zabbix-servers/venv/bin/ansible
  python version = 3.6.9 (default, Nov  7 2019, 10:44:02) [GCC 8.3.0]
```

##### OS / ENVIRONMENT
Zabbix 4.4.4 on RHEL7

##### STEPS TO REPRODUCE
Export a template (no matter if with Zabbix itself or ansible). Change the corresponding linked template section of a template and reimport it.

Exported with Zabbix:
```yaml
<zabbix_export>
    <version>4.4</version>
    <date>2020-01-23T13:25:32Z</date>
    <groups>
        <group>
            <name>Templates</name>
        </group>
    </groups>
    <templates>
        <template>
            <template>fisma</template>
            <name>fisma</name>
            <templates>
                <template>
                    <name>fismb</name>
                </template>
            </templates>
            <groups>
                <group>
                    <name>Templates</name>
                </group>
            </groups>
        </template>
    </templates>
</zabbix_export>
```

Change to this with removing all linked templates ( fismb in above example ).
```yaml
<zabbix_export>
    <version>4.4</version>
    <date>2020-01-23T13:25:32Z</date>
    <groups>
        <group>
            <name>Templates</name>
        </group>
    </groups>
    <templates>
        <template>
            <template>fisma</template>
            <name>fisma</name>
            <groups>
                <group>
                    <name>Templates</name>
                </group>
            </groups>
        </template>
    </templates>
</zabbix_export>
```

##### EXPECTED RESULTS
fismb should be unlinked from fisma.


##### ACTUAL RESULTS
fismb is still linked with fisma.
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'community'}
DOCUMENTATION = r'''
---
module: zabbix_template
short_description: Create/update/delete/dump Zabbix template
description:
    - This module allows you to create, modify, delete and dump Zabbix templates.
    - Multiple templates can be created or modified at once if passing JSON or XML to module.
version_added: "2.5"
author:
    - "sookido (@sookido)"
    - "Logan Vig (@logan2211)"
    - "Dusan Matejka (@D3DeFi)"
requirements:
    - "python >= 2.6"
    - "zabbix-api >= 0.5.4"
options:
    template_name:
        description:
            - Name of Zabbix template.
            - Required when I(template_json) or I(template_xml) are not used.