Add some more comments to models/frozen.py

Some people get confused and tried to add new models in models/frozen.py
To prevent this add some more information in comments in this file.

Change-Id: Iaa52ae2a826609f94e1aa81d815ae7c082bf9204

diff --git a/neutron/db/migration/models/frozen.py b/neutron/db/migration/models/frozen.py
index ccce460dff95f92aeeda066a1271d97cdd895aed..528fc416534fd0ed94184034fbf397e31ff0fb70 100644 (file)
--- a/neutron/db/migration/models/frozen.py
+++ b/neutron/db/migration/models/frozen.py
@@ -14,7 +14,10 @@
 #    under the License.
 
 """
-The module provides all database models.
+This module should not be changed.
+
+The module provides all database models that were present at the moment of
+creation of heal_script.
 
 Its purpose is to create comparable metadata with current database schema.
 Based on this comparison database can be healed with healing migration.