ipa-client: correct directory location by using constants instead
    
    If something in the client sysrestore.state wasn't removed by
    the installer a warning message was printed with an incorrect
    location. Fix this by using constants instead.
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>