Close the cursor for SQLite for 034 upgrade/downgrade on select

The list() is needed around the table select for SQLite upgrade/downgrade
to work.  This forces a cursor close and prevents database locked errors.

closes-bug: 1233329
Change-Id: I01aedf9d2743a86881c124c9690f10233d9966bc

keystone/common/sql/migrate_repo/versions/034_add_default_project_id_column_to_user.py

@@ -23,7 +23,7 @@
 def migrate_default_project_from_extra_json(meta, migrate_engine):
     user_table = sql.Table('user', meta, autoload=True)
 
-    user_list = user_table.select().execute()
+    user_list = list(user_table.select().execute())
     session = sessionmaker(bind=migrate_engine)()
     for user in user_list:
         try:
@@ -58,7 +58,7 @@ def migrate_default_project_from_extra_json(meta, migrate_engine):
 def migrate_default_project_to_extra_json(meta, migrate_engine):
     user_table = sql.Table('user', meta, autoload=True)
 
-    user_list = user_table.select().execute()
+    user_list = list(user_table.select().execute())
     session = sessionmaker(bind=migrate_engine)()
     for user in user_list:
         try: