changes util.format to use require
changes util.format to use require

some versions of node seem to not have a global util in an
eval context. changes `util.format` to `require("util").format`
to address this issue.

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