https://bugzilla.redhat.com/show_bug.cgi?id=621928

Description: RUV (nsuniqueid=ffffffff-ffffffff-ffffffff-ffffffff,<suffix>)
needs to be allowed to add to the DB before <suffix> is added.  To allow
it, entryrdn prepares the rdn exception list (rdn_exceptions).  If the
to-be-added entry (in this case RUV; and currently only RUV is in the
list) is in the list, <suffix> is added to the entryrdn index with the
temporary entry ID 0 (note: not to the primary db file id2entry.db#).
When the suffix is indeed added to the DB, the temporary ID 0 is replaced
with the given real ID.