HostController: no loop check for 'fake' services

Inherited services do not exist in the db. As many services would
carry their template's name, the fallback to a name-based loop check
would trigger an erraneous error. So we trigger no preliminary loop
check for those now.

fixes #12938

application/controllers/HostController.php

@@ -218,9 +218,9 @@ class HostController extends ObjectController
             ->setDb($db)
             ->setHost($host)
             ->setInheritedFrom($from->object_name)
-            ->setObject($service)
+            ->setObject($service);
-            ->handleRequest()
+        $this->view->form->setResolvedImports();
-            ;
+        $this->view->form->handleRequest();
 
         $this->setViewScript('object/form');
     }

library/Director/Web/Form/DirectorObjectForm.php

@@ -76,10 +76,10 @@ abstract class DirectorObjectForm extends QuickForm
         $object = $this->object;
 
         if (! $object instanceof IcingaObject) {
-            return $this->resolvedImports = false;
+            return $this->setResolvedImports(false);
         }
         if (! $object->supportsImports()) {
-            return $this->resolvedImports = false;
+            return $this->setResolvedImports(false);
         }
 
         if ($this->hasBeenSent()) {
@@ -99,7 +99,12 @@ abstract class DirectorObjectForm extends QuickForm
             return $this->resolvedImports = false;
         }
 
-        return $this->resolvedImports = true;
+        return $this->setResolvedImports();
+    }
+
+    public function setResolvedImports($resolved = true)
+    {
+        return $this->resolvedImports = $resolved;
     }
 
     public function isObject()