Following the update to Zuul v3 some things changed:
- nodes.delete became nodes.deleting
- nodes.used became nodes.in-use but nodes.used is still relevant
as it's the status between 'in-use' and 'deleting'
- Add a panel for displaying failed nodes
Change-Id: I240d082115bd9078e45984d8fcff212a4e40e842
Depends-On: I6a89752d74ed7424267c3af3937ad01fb4bb8f86