[ENH] Fill in_index automatically in ApplyTOPUP if not defined
[ENH] Fill in_index automatically in ApplyTOPUP if not defined

mick-d/nipype,FCP-INDI/nipype,FCP-INDI/nipype,carolFrohlich/nipype,carolFrohlich/nipype,FCP-INDI/nipype,mick-d/nipype,mick-d/nipype,carolFrohlich/nipype,mick-d/nipype,carolFrohlich/nipype,FCP-INDI/nipype