fix: wrong systemd unit-file path (based on official doc this time)

manifests/init.pp

@@ -113,7 +113,7 @@ class amies (
   # Create systemd unit-file
   file { 'AMIES systemd unit':
     ensure  => file,
-    path    => '/etc/default/systemd/amies.service',
+    path    => '/etc/systemd/system/amies.service',
     mode    => '0644',
     content => epp('amies/amies.service.epp'),
   }