Handles salt_host resources.
    See https://github.com/dmacvicar/terraform-provider-salt

    Returns roster attributes for the resource or None

def _handle_salt_host_resource(resource):
    '''
    Handles salt_host resources.
    See https://github.com/dmacvicar/terraform-provider-salt

    Returns roster attributes for the resource or None
    '''
    ret = {}
    attrs = resource.get('primary', {}).get('attributes', {})
    ret[MINION_ID] = attrs.get(MINION_ID)
    valid_attrs = set(attrs.keys()).intersection(TF_ROSTER_ATTRS.keys())
    for attr in valid_attrs:
        ret[attr] = _cast_output_to_type(attrs.get(attr), TF_ROSTER_ATTRS.get(attr))
    return ret