Updated file interpolation to use literal name instead of object. This will...

Updated file interpolation to use literal name instead of object.  This will make some edge case parsing easier in the future.

chipathlon/workflow_job.py

@@ -521,7 +521,7 @@ class WorkflowJob(object):
                 # Lists can only be loaded from inputs
                 add_value = []
                 for file_dict in inputs[arg_value]["values"]:
-                    add_value.append(file_dict["file"])
+                    add_value.append(file_dict["file"].name)
             else:
                 # Conditionally load from inputs / outputs
                 # This will only load the dict of information though, not
@@ -531,7 +531,7 @@ class WorkflowJob(object):
                 if add_value is not None:
                     if arg_info["type"] in chipathlon.conf.argument_types["file"]:
                         # Want the actual Pegasus file obj
-                        add_value = add_value.get("file")
+                        add_value = add_value.get("file").name
                     else:
                         # Get the actual argumnet value
                         add_value = add_value.get("value")