(ITS#8478) Master/Slave Replication not catching up if syncrepl config is defined before the replication user exist

[elecharny@apache.org]

Full_Name: Emmanuel L.charny
Version: 2.4.42
OS: linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (86.247.10.144)


When configuring syncrepl using slapd.d on a slave, if the replicator user does
not exist beforehand, replication won't catch with entries that were updated
prior the creation of the replicator user on the slave. OTOH, if we create this
replicator user *before* setting the replication configuration on the slave,
every updated entries on the master are replicated, even those created before
the configuration modification.