Don't call memberof task when re-initializing a replica.
    
    memberof is not in the EXCLUDE list of nsDS5ReplicatedAttributeListTotal
    so we have no need of running the task, memberof will come with the
    data.
    
    If that attribute doesn't exist then this agreement was created with
    an older version of 389-ds, we DO need to initialize memberOf.
    
    https://fedorahosted.org/freeipa/ticket/2199