Name group and template against zbx_gear_templates

When you declare an host on Zabbix Api you need to use existing group and template names. those names seems case sensitives.

This commit align names on https://github.com/a13m/openshift-zabbix-cartridge/blob/master/versions/shared/configuration/etc/templates/zbx_gear_templates.xml content
Name group and template against zbx_gear_templates

Temaplate name references are case sensitive on Zabbix so this commit align names to be understood on import.
Merge pull request #8 from LudoMeurillon/fix_template_and_group_names

Fix template and group names