Deleting security group does not mark rules as deleted

Adds query to also delete rules for parent_group_id

Fixes bug 1056380

Change-Id: I3d041b49703bf298a80d2ebe19c1298eecf2d98d

nova/db/sqlalchemy/api.py

@@ -3571,6 +3571,12 @@ def security_group_destroy(context, security_group_id):
                         'deleted_at': timeutils.utcnow(),
                         'updated_at': literal_column('updated_at')})
 
+        session.query(models.SecurityGroupIngressRule).\
+                filter_by(parent_group_id=security_group_id).\
+                update({'deleted': True,
+                        'deleted_at': timeutils.utcnow(),
+                        'updated_at': literal_column('updated_at')})
+
 
 @require_context
 def security_group_count_by_project(context, project_id, session=None):