Here, this should probably be `OpenStackException` and not `CloudStackException` :)

We recently also added a new `ProviderError` base exception class (https://github.com/apache/libcloud/blob/cb9d374732fca01d488e117221baf1fbf6603032/libcloud/common/types.py#L67) for error like this, so please make sure this class inherits from it.