Ticket 13 - Add init function to create new domain entries
    
    Bug Description:  When we create a new backend, we were missing a
    way to populate the entries for usage.
    
    Fix Description:  Add an initialise command to dsidm which is
    capable of creating sample entries based on the version supplied
    or defaulting to the highest available version.
    
    https://pagure.io/lib389/issue/13
    
    Author: wibrown
    
    Review by: spichugi (Thanks!)