key error in init_plot

@roscar I was getting this error when trying to use the interactive view in the weekend:

KeyError: ('SPB_EXP_SYS/TSYS/UTC_1_S3', 'image')

I fixed it by adding the if statement below to line 148 in geometry.py in the _find_good_trains(self): function:

            for file in source_files:
                if 'SPB_DET_AGIPD1M-1/DET' in source_name:
                    good_trains_source += \
                        set(file.train_ids[file.get_index(source_name, 'image')[1].nonzero()])

I don't think we had this data source in the DAQ previously. I think you could also use the same search/matching criteria that karabo_data does with the find_trains('*/DET/*') (or similar) functionality instead.

Cheers, Henry