All devices should be in an active/licensed state.

        :raises: UnexpectedClusterState

def _check_devices_active_licensed(self):
        '''All devices should be in an active/licensed state.

        :raises: UnexpectedClusterState
        '''

        if len(self._get_devices_by_activation_state('active')) != \
                len(self.devices):
            msg = "One or more devices not in 'Active' and licensed state."
            raise UnexpectedDeviceGroupState(msg)