Add docs for object::notification
Add docs for object::notification

Icinga/puppet-icinga2,lazyfrosch/puppet-icinga2,Icinga/puppet-icinga2-rewrite,lazyfrosch/puppet-icinga2,Icinga/puppet-icinga2,Icinga/puppet-icinga2-rewrite,lazyfrosch/puppet-icinga2,Icinga/puppet-icinga2-rewrite