Adjust to wikitcms "dist" support, enable IoT event creation
    
    We changed wikitcms to handle dists (Fedora, Fedora-IoT etc.)
    generically, rather than only having hardcoded support for Fedora
    and Fedora-Modular. This adapts relvalconsumer to the changes and
    enables IoT event creation.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>