Attribute vars of object type service can be also a string

[lbetz]

Error: Evaluation Error: Error while evaluating a Resource Statement, Icinga2::Object::Service[http]: parameter 'vars' expects a value of type Undef or Hash, got String at /root/puppetcode/modules/icinga2/examples/example_config.pp:97 on node centos7.localdomain

::icinga2::object::service { 'http':
target => '/etc/icinga2/example.d/services.conf',
apply => 'vhost => config in host.vars.http_vhosts',
import => [ 'generic-service' ],
check_command => 'http',
vars => 'vars + config',
}