Merge pull request #1187 from jumpserver/dev

[Bugfix] 修复一个脚本的bug

utils/2018_04_11_migrate_permissions.sh

@@ -5,7 +5,7 @@ python ../apps/manage.py shell << EOF
 from perms.models import *
 
 for old in NodePermission.objects.all():
-    perm = asset_perm_model.objects.using(db_alias).create(
+    perm = AssetPermission.objects.create(
             name="{}-{}-{}".format(
                 old.node.value,
                 old.user_group.name,