Call the LDAPClient layer when modifying values
    
    For add/remove member and remove_principal the LDAP connection
    was being used directly, bypassing the LDAPClient overlay.
    
    Related: https://pagure.io/freeipa/issue/8798
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Rafael Guterres Jeffman <rjeffman@redhat.com>