correctly node deletion

Registered by Andrey Shestakov

Now when user deletes compute node from Fuel, this node remains in hypervisors list
and shows in nova-manage service list with status (XXX)

Same problem with Ceph nodes. Deleted nodes remains in ceph osd tree.
Also when user deletes more or equal nodes then ceph replication factor,
some resources can gone away (if all replicas locates on deleted nodes)

Need implement functionality for proper node deletion.

Will good to implement also migration of resources, or just warn user about resources loss.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Andrey Shestakov
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
Accepted for future
Implementation:
Not started
Milestone target:
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