Fix fsl tests failing due to file extensions.
Fix fsl tests failing due to file extensions.

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1204 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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