Attempt to use sudo in fetch_data.cwl in the hopes of creating a symlink

steps/fetch_data.cwl

@@ -32,6 +32,6 @@ requirements:
             globus-url-copy $turl - | tar -xvf -
           else
             echo "Downloading $1 with gfal-copy"
-            ln -s /usr/bin/python3 /usr/bin/python
+            sudo ln -s /usr/bin/python3 /usr/bin/python
             gfal-copy $1 - | tar -xvf -
           fi