Retain "outdir" in WorkflowJob.job.

Otherwise, the `--tmp-outdir-prefix` option passed on the command line is not respected, and outputs are instead written to the system temp directory.

Author: jxtx

cwltool/workflow.py

@@ -438,9 +438,6 @@ def job(self, joborder, output_callback, **kwargs):
         self.state = {}
         self.processStatus = "success"
 
-        if "outdir" in kwargs:
-            del kwargs["outdir"]
-
         for e, i in enumerate(self.tool["inputs"]):
             with SourceLine(self.tool["inputs"], e, WorkflowException):
                 iid = shortname(i["id"])