3ecaadbb35
This change adds support for node retirement: nodes can have additional properties 'retired' and 'retired_reason' which change the way the nodes (can) traverse the FSM and which operations are allowed. In particular: - retired nodes cannot move from manageable to available; - upon instance deletion, retired nodes move to manageable (rather than available). Story: #2005425 Task: #38142 Change-Id: I8113a44c28f62bf83f8e213aeb6704f96055d52b