added InputSpec tests to test_preprocess.py
added InputSpec tests to test_preprocess.py

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1735 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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