The lease id recently disappeared from the availability zone info in
servers. It broke the configure part of an appliance, as we were using
this info to create an ansible inventory for the stack. Unfortunately,
after an exchange with Chameleon staff, it became clear that
this "feature" wasn't intended.
We now add metadata to our appliance template, allowing us to add the
arbitrary info we need to the server info. This way we can filter as we
want. This should make the script more future-proof.