fixing recursive deletion of domains
recursive deletion: need to find and delete objects with objectclass ldapsubentry as well (#5100).
This is for example needed when deleting a domain, for the role kolab-admin which has class ldapsubentry
Reviewers: vanmeeuwen, Web Administration Panel Developers
Reviewed By: vanmeeuwen, Web Administration Panel Developers
Subscribers: machniak, vanmeeuwen
Differential Revision: https://git.kolab.org/D23