Add a FreeIPA replication job set
    
    This adds a set of jobs to test FreeIPA replication. We deploy
    a server, deploy a replica of that server, then enrol a client
    against the replica and run the client tests.
    
    At first I was planning to add the replica testing into the
    main set of FreeIPA tests, but the test ordering/blocking (via
    mutexes and barriers and what-have-you) just turns into a big
    nightmare that way. This way seems rather simpler to deal with.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>