Initial set of defaults for existing modules
    
    This defines defaults for django, reviewboard and nodejs.
    
    django and nodejs don't have default streams as we rely on content
    already available in Fedora; these modules only provide alternatives.
    
    reviewboard has a default stream that depends on the modular django.  If
    anything from this stream is installed, the django module will be
    activated.
    
    All defaults define installation profiles for all available streams.
    
    Signed-off-by: Petr Šabata <contyk@redhat.com>