78baeeb Server Upgrade: handle errors better

4 files Authored by mbasti 6 years ago, Committed by jcholast 6 years ago,
    Server Upgrade: handle errors better
    
    * Prevent to continue with upgrade if a fatal error happened
    * Use exceptions to handle failures
    
    https://fedorahosted.org/freeipa/ticket/4904
    
    Reviewed-By: David Kupka <dkupka@redhat.com>