By default project auto close when you exit client

gns3server/controller/import_project.py

@@ -79,7 +79,7 @@ def import_project(controller, project_id, stream, location=None, name=None, kee
         # To avoid unexpected behavior (project start without manual operations just after import)
         topology["auto_start"] = False
         topology["auto_open"] = False
-        topology["auto_close"] = False
+        topology["auto_close"] = True
 
         # Modify the compute id of the node depending of compute capacity
         if not keep_compute_id: