blockerbugs: set another sebool so openid works
    
    Turns out that the httpd_can_network_connect sebool has to be set in
    newer OSs (previous was el7) in order for python_openid to be able to
    initiate discovery as part of login.
    
    This is a simple change that sets httpd_can_network_connect to 1 for the
    blockerbugs role that should only affect machines running the app.