Crash following db instance deletion

[Andrew Bogott]

Usually (but not always) after I delete a database instance, the dashboard triggers an unhandled exception. This results in an unhelpful "Something went wrong!" page.

[Andrew Bogott (andrewbogott)]

The stack trace suggests this is happening in a self._extra_data(instance). Either we're using an invalid cache of existing db instances or there's a race where the instance exists when the list is created but deleted before we get to the _extra_data() call.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/trove-dashboard 17.0.0.0rc1 release candidate.