List domains that have been cached

    CLI Example:

    .. code-block:: bash

        salt-run venafi.list_domain_cache

def list_domain_cache():
    '''
    List domains that have been cached

    CLI Example:

    .. code-block:: bash

        salt-run venafi.list_domain_cache
    '''
    cache = salt.cache.Cache(__opts__, syspaths.CACHE_DIR)
    return cache.list('venafi/domains')