Magnet ODMR alignment fails in dummy configuration

[drogenlied]

Migration: trac#228.

Backtrace:

File "/home/jan/qo/qudi/logic/magnet_logic.py", line 786, in _stepwise_loop_body
    meas_val, add_meas_val = self._do_alignment_measurement()

File "/home/jan/qo/qudi/logic/magnet_logic.py", line 1030, in _do_alignment_measurement
    data, add_data = self._perform_odmr_measure()

File "/home/jan/qo/qudi/logic/magnet_logic.py", line 1172, in _perform_odmr_measure
    name_tag)

File "/home/jan/qo/qudi/logic/odmr_logic.py", line 1154, in perform_odmr_measurement
    self.save_ODMR_Data(tag=name_tag, timestamp=timestamp)

TypeError?: save_ODMR_Data() got an unexpected keyword argument 'timestamp'