Delete all systems from Spacewalk

    CLI Example:

    .. code-block:: bash

        salt-run spacewalk.deleteAllSystems spacewalk01.domain.com

def deleteAllSystems(server):
    '''
    Delete all systems from Spacewalk

    CLI Example:

    .. code-block:: bash

        salt-run spacewalk.deleteAllSystems spacewalk01.domain.com
    '''

    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}

    systems = client.system.listSystems(key)

    ids = []
    names = []
    for system in systems:
        ids.append(system['id'])
        names.append(system['name'])

    if client.system.deleteSystems(key, ids) == 1:
        return {'deleted': names}
    else:
        return {'Error': 'Failed to delete all systems'}