def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def mouse_rotate(xAngle, yAngle, zAngle):
    glRotatef(xAngle, 1.0, 0.0, 0.0);
    glRotatef(yAngle, 0.0, 1.0, 0.0);
    glRotatef(zAngle, 0.0, 0.0, 1.0);