Fixed bug with ants initialization
Fixed bug with ants initialization

On one hand, invert_initial_moving_transform was used and needed to
be defined. On the other, as there is a xorg spec with initial_moving_transform_com,
it was still failing.

glatard/nipype,pearsonlab/nipype,JohnGriffiths/nipype,dgellis90/nipype,dmordom/nipype,glatard/nipype,arokem/nipype,JohnGriffiths/nipype,arokem/nipype,blakedewey/nipype,Leoniela/nipype,sgiavasis/nipype,wanderine/nipype,carolFrohlich/nipype,rameshvs/nipype,iglpdc/nipype,blakedewey/nipype,blakedewey/nipype,gerddie/nipype,iglpdc/nipype,FCP-INDI/nipype,FCP-INDI/nipype,fprados/nipype,FCP-INDI/nipype,glatard/nipype,glatard/nipype,grlee77/nipype,Leoniela/nipype,mick-d/nipype,dgellis90/nipype,rameshvs/nipype,carolFrohlich/nipype,gerddie/nipype,arokem/nipype,sgiavasis/nipype,dmordom/nipype,pearsonlab/nipype,arokem/nipype,JohnGriffiths/nipype,gerddie/nipype,iglpdc/nipype,wanderine/nipype,mick-d/nipype,JohnGriffiths/nipype,fprados/nipype,grlee77/nipype,wanderine/nipype,gerddie/nipype,iglpdc/nipype,carolFrohlich/nipype,wanderine/nipype,blakedewey/nipype,FCP-INDI/nipype,rameshvs/nipype,sgiavasis/nipype,mick-d/nipype,grlee77/nipype,carolFrohlich/nipype,rameshvs/nipype,sgiavasis/nipype,Leoniela/nipype,mick-d/nipype,grlee77/nipype,fprados/nipype,dgellis90/nipype,dgellis90/nipype,pearsonlab/nipype,pearsonlab/nipype,dmordom/nipype