Stack object.
Bases: heat.objects.base.HeatObject, oslo_versionedobjects.base.VersionedObjectDictCompat, oslo_versionedobjects.base.ComparableVersionedObject
Update the stack by selecting on traversal ID.
Uses UPDATE ... WHERE (compare and swap) to catch any concurrent update problem.
If the stack is found with given traversal, it is updated.
If there occurs a race while updating, only one will succeed and other will get return value of False.