- Don't trash a node to recreate it right after (it was the case when a
  node was known by address only).
- Check node type consistency between:
  - parameters and node found
  - node known by type and node known by UUID
- Log actions before doing them, consistently
- Log found node in addition to loop variables
- Don't call remove when an unknown node is notified as down, and add a
  log for this case

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2049 71dcc9de-d417-0410-9af5-da40c76e7ee4