* Zabbix 3.4 support fix.
As of 3.4 Zabbix version application does not have 'updateExisting'.
* added updateExisting in applications for old zabbix support.
* small codestylefix
* Add idempotency and import/export support to zabbix_template
Adds idempotency to the template update functions and check mode,
also adds the ability to dump and import json template
configurations.
* Fix issue clearing groups from template
When an empty list is provided for group names, all groups associations
should be cleared from the template. Previous behavior caused the
template to be associated to all existing groups if an empty list
was provided.
* Fix undefined variable references
* Add example importing template from ansible variable
Document a sample template import with bare minimum structure.
No items or graphs are added, only 1 application is added to the
template.
