Fix missing parent attribute for icinga2_envzone 
Fix missing parent attribute for icinga2_envzone 

Previously parent variable was missing from template  in icinga2_envzone and thus does not show up in template.
Icinga/chef-icinga2,vkhatri/chef-icinga2-1,Icinga/chef-icinga2,Icinga/chef-icinga2,vkhatri/chef-icinga2-1,vkhatri/chef-icinga2-1