'Update stats (mandatory step for all the stats).
The update is made twice (for rate computation).'

def test_000_update(self):

    print 'INFO:    [TEST_000]    Test    the    stats    update    function'
    try:
        stats.update()
    except Exception as e:
        print ('ERROR:    Stats    update    failed:    %s' % e)
        self.assertTrue(False)
    time.sleep(1)
    try:
        stats.update()
    except Exception as e:
        print ('ERROR:    Stats    update    failed:    %s' % e)
        self.assertTrue(False)
    self.assertTrue(True)
