Currently templates are not pre-installed in distributive - we just have folder trunk/templates. It does not make sense for end users.
For 3.4 we could add them manually to SQL scripts.

Still solution is required for use cases:
1) I'm end user and want to install / update single template through web interface.
2) I'm admin and making new installation of Zabbix 3.4 - all SNMP devices templates should be available out of the box.

Possible solutions:

• create make templates command and load templates through API.
• publication of templates at http://zabbix.org/wiki/Zabbix_Templates/Official_Templates