drop data of temp instance [ch50588]

(cherry picked from commit 73d4159)

Author: FChataigner

dataikuapi/dss/app.py

@@ -135,7 +135,7 @@ def __init__(self, client, project_key):
 
 
     def close(self):
-        self.get_as_project().delete()
+        self.get_as_project().delete(drop_data=True)
 
     def __enter__(self,):
         return self