tests/test_rdfprint.py: Use local resource to assert return 0 of main
tests/test_rdfprint.py: Use local resource to assert return 0 of main

common-workflow-language/cwltool,dleehr/cwltool,dleehr/cwltool,dleehr/cwltool,common-workflow-language/cwltool,common-workflow-language/cwltool,dleehr/cwltool