SessionBasedDaemon: use Engine.redo() to re-do tasks.

Relying on changing the tasks' state while they are attached to the
Engine is -at the moment- a recipe for trouble.

gc3libs/cmdline.py

@@ -2222,8 +2222,7 @@ def redo(self, jobid=None, from_stage=None):
                         % (jobid, err))
 
             try:
-                task.attach(self._parent._controller)
-                task.redo(*args)
+                self._parent._controller.redo(task, *args)
                 self._parent.session.save(task)
                 return ("Task `%s` successfully resubmitted" % jobid)
             except Exception as err: