Ticket 525 - Introducing a user visible configuration variable for controlling replication retry time
RFE Description: The current replication backoff timer is hardcoded to have a minimum of 3 seconds,
and a max of 300 seconds. Added two new config attributes to the replication config:
nsds5ReplicaBackoffMin
nsds5ReplicaBackoffMax
https://fedorahosted.org/389/ticket/525
Reviewed by: nhosoi(Thanks!)