Add nsds5ReplicaReleaseTimeout to replica config
    
    The nsds5ReplicaReleaseTimeout setting prevents the monopolization of
    replicas during initial or busy master-master replication. 389-DS
    documentation suggets a timeout of 60 seconds to improve convergence of
    replicas.
    
    See: http://directory.fedoraproject.org/docs/389ds/design/repl-conv-design.html
    Fixes: https://pagure.io/freeipa/issue/7488
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
    Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>