add unit tests for object apiuser
add unit tests for object apiuser

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