Rename plugin_config template to option_config
    
    Give the configuration template, which maps Config objects into
    HTML, a more generic name.
    
    Along with the rename this also drops the user.is_admin check so
    a user can manage their SP data.
    
    The backend still enforces writing.
    
    https://fedorahosted.org/ipsilon/ticket/25
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-by: Simo Sorce <simo@redhat.com>