As schema is now handled by the schema updater, these entries
are superfluous.

https://fedorahosted.org/freeipa/ticket/3454

In order to have control over the order that updates are applied
a numbering system was created for the update files. These values
were not actually used.

The updates were sorted by DN length and in most cases this was
adequate for proper function. The exception was with roles where
in some cases a role was added as a member of a permission before
the role itself was added so the memberOf value was never created.

Now updates are computed and applied in blocks of 10.

https://fedorahosted.org/freeipa/ticket/3377

We want to process some updates in a particular order (schema, structural).
Using an init-inspired ordering mechanism.