Allow Jinja2 in raw_config_wrapper.conf and pass the `compose` variable there.
    
    This should allow configuring ODCS in a way that particular raw_config compose
    configuration variables can be overriden.
    
    For example, the `pkgset_koji_builds` can be set according to `compose.builds`
    which is set in the ODCS REST API when requesting the compose.
    
    Signed-off-by: Jan Kaluza <jkaluza@redhat.com>