Bug 624442 - MMR: duplicate replica ID
    
    https://bugzilla.redhat.com/show_bug.cgi?id=624442
    
    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.