https://fedorahosted.org/sssd/ticket/1758
The autofs entries do not have the key as an unique identifier, but
rather the full (key, value) tuple as some keys have a special meaning,
such as the direct mount key (/-) and may be present in a single map
multiple times.
Comparing the full DN that contains both the key and the value will
allow for working updates if either key or value changes.