minor changes

scripts/dataset_specific/start_j0251_apr_2021.py

scripts/training/launch_trainer_randla.py

syconn/analysis/syconn_knossos_viewer.py

syconn/batchjob_scripts/batchjob_dataset_analysis_collect.py

syconn/cnn/cnn_celltype_ptcnv_j0251.py

syconn/cnn/cnn_celltype_randla_j0251.py

syconn/exec/exec_init.py

syconn/extraction/cs_processing_steps.py

syconn/mp/batchjob_utils.py

syconn/proc/sd_proc.py

syconn/reps/segmentation.py

syconn/reps/super_segmentation_dataset.py

syconn/reps/super_segmentation_helper.py

syconn/reps/super_segmentation_object.py