Add switch to surpress the Bodhi comments
    
    Sometimes, Bodhi comments can be annoying for some users and they wish
    for a cleaner process. This adds a CLI switch --skip-bodhi-comments
    to surpress those comments and only show comments posted by real users.
    
    Fixes: https://pagure.io/fedora-easy-karma/issue/36
    Merges: https://pagure.io/fedora-easy-karma/pull-request/37
    Co-authored-by: Kamil Páral <kparal@redhat.com>