Load core modules also when bootstrapping the CLI

refs #7163

library/Icinga/Application/Cli.php

@@ -43,7 +43,8 @@ class Cli extends ApplicationBootstrap
             ->parseBasicParams()
             ->setupLogger()
             ->setupResourceFactory()
-            ->setupModuleManager();
+            ->setupModuleManager()
+            ->loadCoreModules();
     }
 
     protected function setupLogging()