Delete all server groups from Spacewalk

def deleteAllGroups(server):
    '''
    Delete all server groups from Spacewalk
    '''

    try:
        client, key = _get_session(server)
    except Exception as exc:
        err_msg = 'Exception raised when connecting to spacewalk server ({0}): {1}'.format(server, exc)
        log.error(err_msg)
        return {'Error': err_msg}

    groups = client.systemgroup.listAllGroups(key)

    deleted_groups = []
    failed_groups = []

    for group in groups:
        if client.systemgroup.delete(key, group['name']) == 1:
            deleted_groups.append(group['name'])
        else:
            failed_groups.append(group['name'])

    ret = {'deleted': deleted_groups}
    if failed_groups:
        ret['failed'] = failed_groups
    return ret