Merge branch '6270-kerberos-issue-declaring-class-invisible-without-attrs' into 'dev'

Resolve "[Kerberos] - Issue declaring class invisible without attrs"

See merge request fusiondirectory/fd-plugins!1039

kerberos/personal/kerberos/class_kerberosAccount.inc

@@ -295,6 +295,7 @@ class kerberosAccount extends simplePlugin
       ],
       'invisible'          => [
         'class' => ['invisible'],
+        'attrs' => []
       ],
     ];
   }