Issue 48006 - Add a new CI test case
Bug Description: Missing warning for invalid replica backoff configuration
Fix Description: Add a test case that will check the invalid replica backoff configuration
(the case when nsds5ReplicaBackoffMin is set to the bigger value than nsds5ReplicaBackoffMax)
https://pagure.io/389-ds-base/issue/48006
Reviewed by: spichugi, wibrown (Thanks!)
Signed-off-by: Simon Pichugin <spichugi@redhat.com>