Remove bugs that prevented the pipeline from running

bip/main.py

bip/pipelines/IDPs_gen/IDP_SWI_T2star.py

bip/pipelines/IDPs_gen/IDP_T1_FIRST_vols.py

bip/pipelines/IDPs_gen/IDP_T1_SIENAX.py

bip/pipelines/IDPs_gen/IDP_T1_align_to_std.py

bip/pipelines/IDPs_gen/IDP_all_align_to_T1.py

bip/pipelines/IDPs_gen/IDP_diff_TBSS.py

bip/pipelines/IDPs_gen/IDP_diff_autoPtx.py

bip/pipelines/IDPs_gen/IDP_diff_eddy_outliers.py

bip/pipelines/IDPs_gen/IDP_func_TSNR.py

bip/pipelines/IDPs_gen/IDP_func_head_motion.py

bip/pipelines/IDPs_gen/IDP_subject_COG_table.py

bip/pipelines/IDPs_gen/IDP_subject_centre.py

bip/pipelines/IDPs_gen/IDPs_generator.py

bip/pipelines/dMRI_diff/diff_dtifit.py

bip/pipelines/fMRI_rest/rfMRI_netmats_fnc.py

bip/pipelines/struct_FS/FS_get_IDPs_fnc.py

bip/pipelines/struct_T1/T1_QC_CNR_eyes.py

bip/pipelines/struct_T1/T1_brain_extract.py

bip/pipelines/struct_T1/T1_first.py