Print version string in installer
    
    The server, replica, and client installer now print the current version
    number on the console, before the actual installer starts. It makes it
    easier to debug problems with failed installations. Users typically post
    the console output in a ticket.
    
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>