Fix cwltest list to exit 0
Fix cwltest list to exit 0

common-workflow-language/cwltool,chapmanb/cwltool,chapmanb/cwltool,dleehr/cwltool,common-workflow-language/cwltool,SciDAP/cwltool,jeremiahsavage/cwltool,chapmanb/cwltool,jeremiahsavage/cwltool,SciDAP/cwltool,SciDAP/cwltool,chapmanb/cwltool,dleehr/cwltool,jeremiahsavage/cwltool,dleehr/cwltool,common-workflow-language/cwltool,SciDAP/cwltool,dleehr/cwltool,jeremiahsavage/cwltool