Accept 389-ds JSON replication status messages
    
    389-ds now stores a replication agreement status message in a JSON
    string in a new attribute:
    
                      replicaLastInitStatusJSON
                      replicaLastUpdateStatusJSON
    
    The original status attributes' values are not changing at this time,
    but there are plans to do so eventually as the old status format is
    confusing.
    
    http://www.port389.org/docs/389ds/design/repl-agmt-status-design.html
    
    Fixes: https://pagure.io/freeipa/issue/7975
    
    Signed-off-by: Mark Reynolds <mreynolds@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>