Enter the device plane.

        Enter the device plane a.k.a. mode, i.e. admin, qnx, calvados

def enter_plane(self, plane):
        """Enter the device plane.

        Enter the device plane a.k.a. mode, i.e. admin, qnx, calvados
        """
        try:
            cmd = CONF['driver'][self.platform]['planes'][plane]
            self.plane = plane
        except KeyError:
            cmd = None

        if cmd:
            self.log("Entering the {} plane".format(plane))
            self.device.send(cmd)