pull flirtrpt interface out of node in its test function
pull flirtrpt interface out of node in its test function

shoshber/fmriprep,oesteban/fmriprep,oesteban/preprocessing-workflow,poldracklab/fmriprep,poldracklab/preprocessing-workflow,oesteban/fmriprep,poldracklab/fmriprep,shoshber/fmriprep,chrisfilo/fmriprep,oesteban/preprocessing-workflow,poldracklab/preprocessing-workflow,oesteban/fmriprep,poldracklab/fmriprep