correctly set LDAP bind related attributes when setting up replication
when CA replica configures 'cn=replica,cn=o\=ipaca,cn=mapping tree,cn=config'
entry on remote master during replica installation, the 'nsds5replicabinddn'
and 'nsds5replicabinddngroup' attributes are not correctly updated when this
entry already existed on the master (e.g. when existing domain-level 0
topology was promoted to domain level 1). This patch ensures that these
attributes are always set correctly regardless of existence of the replica
Reviewed-By: Martin Basti <email@example.com>