Fix AttributeError: Cyrus instance has no attribute 'has_folder' in cleanup_acls()
Summary: Also improve performance by removing has_folder() check, and removed redundant debug code
Reviewers: PyKolab Developers, vanmeeuwen
Reviewed By: PyKolab Developers, vanmeeuwen
Subscribers: vanmeeuwen
Differential Revision: https://git.kolab.org/D823