Use a state to determine if a 389-ds upgrade is in progress
    
    When applying update files to 389 the listeners are disabled.
    There is a large try/except around this so that if a failure
    happens then the configuration should be automatically
    restored.
    
    We've seen multiple cases where this doesn't occur. Best guess
    is that users are killing or ^C breaking out of the script.
    
    What happens in that case is that when the next upgrade is run
    the configuration is backed up again overwriting the original
    values. This leaves dirsrv with no listener on 389.
    
    Add a new state, upgrade-in-progress, so that the backup of the
    config information can be skipped when the upgrader is executed
    again after a failure.
    
    The idea behind using a new state value is that if additional
    attributes are ever backed up we don't need to remember to update
    the list of possible saved values to check to decide if the
    upgrade is in progress.
    
    https://pagure.io/freeipa/issue/7534
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>