Test FreeIPA upgrade on updates
    
    This adds the FreeIPA server and client upgrade tests to a new
    updates-server-upgrade flavor which fedora_openqa will schedule
    for updates. This way, we can test whether updates break
    FreeIPA upgrades, which is a request the FreeIPA team made to
    me. This has been deployed on staging for the last week or so
    and appears to work fine.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>