do not clean up Galaxy job dirs. ever.

galaxy.yml

@@ -1602,7 +1602,7 @@ galaxy:
   # completion.  These bits include the job working directory, external
   # metadata temporary files, and DRM stdout and stderr files (if using
   # a DRM).  Possible values are: always, onsuccess, never
-  #cleanup_job: always
+  cleanup_job: never
 
   # When running DRMAA jobs as the Galaxy user
   # (https://docs.galaxyproject.org/en/latest/admin/cluster.html