def get_templates(self):
    '''list templates in the builder bundle library. If a name is provided,
       look it up

    '''

    base = 'https://singularityhub.github.io/builders'
    base = self._get_and_update_setting('SREGISTRY_BUILDER_REPO', base)
    base = "%s/configs.json" %base
    return self._get(base)
list templates in the builder bundle library. If a name is provided,
       look it up