[389-devel] Please review: [Bug 624442] MMR: duplicate replica ID

[Noriko Hosoi]

https://bugzilla.redhat.com/show_bug.cgi?id=624442

https://bugzilla.redhat.com/attachment.cgi?id=473440&action=diff
https://bugzilla.redhat.com/attachment.cgi?id=473440&action=edit

Description: Each replica has an RUV tombstone entry in the
backend db, which keeps nsds50ruv attribute values as follows:
nsds50ruv: {replicageneration}<replica_generation_csn>
nsds50ruv: {replica<rid>  ldap://<host>:<port>}<last_modified>
...
When the replica is deleted, the RUV tombstone entry remains
in the db.  Then if the replica is added back with the different
replica id<rid-2>, the original nsds50ruv value {replica<rid>
ldap://<host>:<port>} was not updated.  This caused the problem
if the counter replica server happened to get the same replica
id<rid>  that this server original had.

This patch compares the replica id<rid>  in the RUV tombstone
entry with the new id<rid-2>.  If they don't match, recreate
the RUV tombstone entry.