Check if uuid is a valid smartos uuid

    Example: e69a0918-055d-11e5-8912-e3ceb6df4cf8

def _is_uuid(uuid):
    '''
    Check if uuid is a valid smartos uuid

    Example: e69a0918-055d-11e5-8912-e3ceb6df4cf8
    '''
    if uuid and list((len(x) for x in uuid.split('-'))) == [8, 4, 4, 4, 12]:
        return True
    return False